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Finding the Fourth Proportional to 525,902.40, 788,853.60 and 420,926.40

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Solution

The fourth proportional to 525,902.40, 788,853.60 and 420,926.40 is: 631,389.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,902.40 : 788,853.60 = 420,926.40 : x
  2. Step 2: Convert to fraction form
    525,902.40/788,853.60 = 420,926.40/x
  3. Step 3: Cross multiply
    525,902.40x = 788,853.60 × 420,926.40
  4. Step 4: Simplify right side
    525,902.40x = 332,049,305,975.04
  5. Step 5: Solve for x
    x = 332,049,305,975.04/525,902.40
  6. Step 6: Final answer
    x = 631,389.60

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Similar ratio
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1.5x scale

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.