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Finding the Fourth Proportional to 714,722.66, 986,310.46 and 392,429.94

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Solution

The fourth proportional to 714,722.66, 986,310.46 and 392,429.94 is: 541,549.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,722.66 : 986,310.46 = 392,429.94 : x
  2. Step 2: Convert to fraction form
    714,722.66/986,310.46 = 392,429.94/x
  3. Step 3: Cross multiply
    714,722.66x = 986,310.46 × 392,429.94
  4. Step 4: Simplify right side
    714,722.66x = 387,057,754,639.17
  5. Step 5: Solve for x
    x = 387,057,754,639.17/714,722.66
  6. Step 6: Final answer
    x = 541,549.58

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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.