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Finding the Fourth Proportional to 719,469.92, 992,870.63 and 392,783.45

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Solution

The fourth proportional to 719,469.92, 992,870.63 and 392,783.45 is: 542,042.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,469.92 : 992,870.63 = 392,783.45 : x
  2. Step 2: Convert to fraction form
    719,469.92/992,870.63 = 392,783.45/x
  3. Step 3: Cross multiply
    719,469.92x = 992,870.63 × 392,783.45
  4. Step 4: Simplify right side
    719,469.92x = 389,983,144,526.80
  5. Step 5: Solve for x
    x = 389,983,144,526.80/719,469.92
  6. Step 6: Final answer
    x = 542,042.32

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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.