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Finding the Fourth Proportional to 638,658.29, 881,369.72 and 348,285.74

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Solution

The fourth proportional to 638,658.29, 881,369.72 and 348,285.74 is: 480,645.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,658.29 : 881,369.72 = 348,285.74 : x
  2. Step 2: Convert to fraction form
    638,658.29/881,369.72 = 348,285.74/x
  3. Step 3: Cross multiply
    638,658.29x = 881,369.72 × 348,285.74
  4. Step 4: Simplify right side
    638,658.29x = 306,968,498,995.52
  5. Step 5: Solve for x
    x = 306,968,498,995.52/638,658.29
  6. Step 6: Final answer
    x = 480,645.92

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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.