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Finding the Fourth Proportional to 402,274.10, 603,411.15 and 121,805.30

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Solution

The fourth proportional to 402,274.10, 603,411.15 and 121,805.30 is: 182,707.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,274.10 : 603,411.15 = 121,805.30 : x
  2. Step 2: Convert to fraction form
    402,274.10/603,411.15 = 121,805.30/x
  3. Step 3: Cross multiply
    402,274.10x = 603,411.15 × 121,805.30
  4. Step 4: Simplify right side
    402,274.10x = 73,498,676,149.10
  5. Step 5: Solve for x
    x = 73,498,676,149.10/402,274.10
  6. Step 6: Final answer
    x = 182,707.95

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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.