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Finding the Fourth Proportional to 917,160.40, 1,375,279.80 and 417,960.40

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Solution

The fourth proportional to 917,160.40, 1,375,279.80 and 417,960.40 is: 626,730.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,160.40 : 1,375,279.80 = 417,960.40 : x
  2. Step 2: Convert to fraction form
    917,160.40/1,375,279.80 = 417,960.40/x
  3. Step 3: Cross multiply
    917,160.40x = 1,375,279.80 × 417,960.40
  4. Step 4: Simplify right side
    917,160.40x = 574,812,495,319.92
  5. Step 5: Solve for x
    x = 574,812,495,319.92/917,160.40
  6. Step 6: Final answer
    x = 626,730.61

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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.