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Finding the Fourth Proportional to 539,978.74, 745,106.79 and 298,246.90

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Solution

The fourth proportional to 539,978.74, 745,106.79 and 298,246.90 is: 411,545.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,978.74 : 745,106.79 = 298,246.90 : x
  2. Step 2: Convert to fraction form
    539,978.74/745,106.79 = 298,246.90/x
  3. Step 3: Cross multiply
    539,978.74x = 745,106.79 × 298,246.90
  4. Step 4: Simplify right side
    539,978.74x = 222,225,790,286.45
  5. Step 5: Solve for x
    x = 222,225,790,286.45/539,978.74
  6. Step 6: Final answer
    x = 411,545.44

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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.