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Finding the Fourth Proportional to 625,200.70, 862,459.54 and 395,370.92

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Solution

The fourth proportional to 625,200.70, 862,459.54 and 395,370.92 is: 545,411.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,200.70 : 862,459.54 = 395,370.92 : x
  2. Step 2: Convert to fraction form
    625,200.70/862,459.54 = 395,370.92/x
  3. Step 3: Cross multiply
    625,200.70x = 862,459.54 × 395,370.92
  4. Step 4: Simplify right side
    625,200.70x = 340,991,421,792.58
  5. Step 5: Solve for x
    x = 340,991,421,792.58/625,200.70
  6. Step 6: Final answer
    x = 545,411.13

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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.