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Finding the Fourth Proportional to 692,019.58, 954,987.15 and 390,213.58

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Solution

The fourth proportional to 692,019.58, 954,987.15 and 390,213.58 is: 538,494.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,019.58 : 954,987.15 = 390,213.58 : x
  2. Step 2: Convert to fraction form
    692,019.58/954,987.15 = 390,213.58/x
  3. Step 3: Cross multiply
    692,019.58x = 954,987.15 × 390,213.58
  4. Step 4: Simplify right side
    692,019.58x = 372,648,954,655.50
  5. Step 5: Solve for x
    x = 372,648,954,655.50/692,019.58
  6. Step 6: Final answer
    x = 538,494.81

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.