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Finding the Fourth Proportional to 638,666.92, 956,915.92 and 385,415.26

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Solution

The fourth proportional to 638,666.92, 956,915.92 and 385,415.26 is: 577,468.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,666.92 : 956,915.92 = 385,415.26 : x
  2. Step 2: Convert to fraction form
    638,666.92/956,915.92 = 385,415.26/x
  3. Step 3: Cross multiply
    638,666.92x = 956,915.92 × 385,415.26
  4. Step 4: Simplify right side
    638,666.92x = 368,809,996,194.42
  5. Step 5: Solve for x
    x = 368,809,996,194.42/638,666.92
  6. Step 6: Final answer
    x = 577,468.45

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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.