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Finding the Fourth Proportional to 714,332.70, 985,814.88 and 392,039.98

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Solution

The fourth proportional to 714,332.70, 985,814.88 and 392,039.98 is: 541,034.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,332.70 : 985,814.88 = 392,039.98 : x
  2. Step 2: Convert to fraction form
    714,332.70/985,814.88 = 392,039.98/x
  3. Step 3: Cross multiply
    714,332.70x = 985,814.88 × 392,039.98
  4. Step 4: Simplify right side
    714,332.70x = 386,478,845,838.90
  5. Step 5: Solve for x
    x = 386,478,845,838.90/714,332.70
  6. Step 6: Final answer
    x = 541,034.79

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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.