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Finding the Fourth Proportional to 661,741,346.40, 992,612,019.60 and 620,926,677.60

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Solution

The fourth proportional to 661,741,346.40, 992,612,019.60 and 620,926,677.60 is: 931,390,016.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,741,346.40 : 992,612,019.60 = 620,926,677.60 : x
  2. Step 2: Convert to fraction form
    661,741,346.40/992,612,019.60 = 620,926,677.60/x
  3. Step 3: Cross multiply
    661,741,346.40x = 992,612,019.60 × 620,926,677.60
  4. Step 4: Simplify right side
    661,741,346.40x = 616,339,283,476,054,144
  5. Step 5: Solve for x
    x = 616,339,283,476,054,144/661,741,346.40
  6. Step 6: Final answer
    x = 931,390,016.40

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Double scale
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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.