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Finding the Fourth Proportional to 719,505.60, 992,901.94 and 392,807.44

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Solution

The fourth proportional to 719,505.60, 992,901.94 and 392,807.44 is: 542,065.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,505.60 : 992,901.94 = 392,807.44 : x
  2. Step 2: Convert to fraction form
    719,505.60/992,901.94 = 392,807.44/x
  3. Step 3: Cross multiply
    719,505.60x = 992,901.94 × 392,807.44
  4. Step 4: Simplify right side
    719,505.60x = 390,019,269,222.43
  5. Step 5: Solve for x
    x = 390,019,269,222.43/719,505.60
  6. Step 6: Final answer
    x = 542,065.65

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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.