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Finding the Fourth Proportional to 485,300.90, 727,951.35 and 130,369.70

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Solution

The fourth proportional to 485,300.90, 727,951.35 and 130,369.70 is: 195,554.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,300.90 : 727,951.35 = 130,369.70 : x
  2. Step 2: Convert to fraction form
    485,300.90/727,951.35 = 130,369.70/x
  3. Step 3: Cross multiply
    485,300.90x = 727,951.35 × 130,369.70
  4. Step 4: Simplify right side
    485,300.90x = 94,902,799,114.10
  5. Step 5: Solve for x
    x = 94,902,799,114.10/485,300.90
  6. Step 6: Final answer
    x = 195,554.55

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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.