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Finding the Fourth Proportional to 615,580.75, 849,515.75 and 386,147.71

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Solution

The fourth proportional to 615,580.75, 849,515.75 and 386,147.71 is: 532,892.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,580.75 : 849,515.75 = 386,147.71 : x
  2. Step 2: Convert to fraction form
    615,580.75/849,515.75 = 386,147.71/x
  3. Step 3: Cross multiply
    615,580.75x = 849,515.75 × 386,147.71
  4. Step 4: Simplify right side
    615,580.75x = 328,038,561,471.43
  5. Step 5: Solve for x
    x = 328,038,561,471.43/615,580.75
  6. Step 6: Final answer
    x = 532,892.82

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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.