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Finding the Fourth Proportional to 390,348.38, 585,070.77 and 179,543.90

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Solution

The fourth proportional to 390,348.38, 585,070.77 and 179,543.90 is: 269,108.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,348.38 : 585,070.77 = 179,543.90 : x
  2. Step 2: Convert to fraction form
    390,348.38/585,070.77 = 179,543.90/x
  3. Step 3: Cross multiply
    390,348.38x = 585,070.77 × 179,543.90
  4. Step 4: Simplify right side
    390,348.38x = 105,045,887,821.80
  5. Step 5: Solve for x
    x = 105,045,887,821.80/390,348.38
  6. Step 6: Final answer
    x = 269,108.04

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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.