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Finding the Fourth Proportional to 710,089.40, 979,930.02 and 404,150.78

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Solution

The fourth proportional to 710,089.40, 979,930.02 and 404,150.78 is: 557,731.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,089.40 : 979,930.02 = 404,150.78 : x
  2. Step 2: Convert to fraction form
    710,089.40/979,930.02 = 404,150.78/x
  3. Step 3: Cross multiply
    710,089.40x = 979,930.02 × 404,150.78
  4. Step 4: Simplify right side
    710,089.40x = 396,039,481,928.42
  5. Step 5: Solve for x
    x = 396,039,481,928.42/710,089.40
  6. Step 6: Final answer
    x = 557,731.86

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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.