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Finding the Fourth Proportional to 305,890.90, 458,901.15 and 92,641.30

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Solution

The fourth proportional to 305,890.90, 458,901.15 and 92,641.30 is: 138,981.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,890.90 : 458,901.15 = 92,641.30 : x
  2. Step 2: Convert to fraction form
    305,890.90/458,901.15 = 92,641.30/x
  3. Step 3: Cross multiply
    305,890.90x = 458,901.15 × 92,641.30
  4. Step 4: Simplify right side
    305,890.90x = 42,513,199,107.50
  5. Step 5: Solve for x
    x = 42,513,199,107.50/305,890.90
  6. Step 6: Final answer
    x = 138,981.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.