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Finding the Fourth Proportional to 543,689.60, 813,921.60 and 404,067.20

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Solution

The fourth proportional to 543,689.60, 813,921.60 and 404,067.20 is: 604,902.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,689.60 : 813,921.60 = 404,067.20 : x
  2. Step 2: Convert to fraction form
    543,689.60/813,921.60 = 404,067.20/x
  3. Step 3: Cross multiply
    543,689.60x = 813,921.60 × 404,067.20
  4. Step 4: Simplify right side
    543,689.60x = 328,879,021,931.52
  5. Step 5: Solve for x
    x = 328,879,021,931.52/543,689.60
  6. Step 6: Final answer
    x = 604,902.18

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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.