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Finding the Fourth Proportional to 493,330.71, 680,747.18 and 278,429.28

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Solution

The fourth proportional to 493,330.71, 680,747.18 and 278,429.28 is: 384,204.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,330.71 : 680,747.18 = 278,429.28 : x
  2. Step 2: Convert to fraction form
    493,330.71/680,747.18 = 278,429.28/x
  3. Step 3: Cross multiply
    493,330.71x = 680,747.18 × 278,429.28
  4. Step 4: Simplify right side
    493,330.71x = 189,539,942,393.55
  5. Step 5: Solve for x
    x = 189,539,942,393.55/493,330.71
  6. Step 6: Final answer
    x = 384,204.63

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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.