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Finding the Fourth Proportional to 719,470.54, 992,871.50 and 392,784.09

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Solution

The fourth proportional to 719,470.54, 992,871.50 and 392,784.09 is: 542,043.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,470.54 : 992,871.50 = 392,784.09 : x
  2. Step 2: Convert to fraction form
    719,470.54/992,871.50 = 392,784.09/x
  3. Step 3: Cross multiply
    719,470.54x = 992,871.50 × 392,784.09
  4. Step 4: Simplify right side
    719,470.54x = 389,984,128,614.44
  5. Step 5: Solve for x
    x = 389,984,128,614.44/719,470.54
  6. Step 6: Final answer
    x = 542,043.22

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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.