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Finding the Fourth Proportional to 521,763.12, 720,044.64 and 292,337.28

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Solution

The fourth proportional to 521,763.12, 720,044.64 and 292,337.28 is: 403,431.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,763.12 : 720,044.64 = 292,337.28 : x
  2. Step 2: Convert to fraction form
    521,763.12/720,044.64 = 292,337.28/x
  3. Step 3: Cross multiply
    521,763.12x = 720,044.64 × 292,337.28
  4. Step 4: Simplify right side
    521,763.12x = 210,495,891,536.18
  5. Step 5: Solve for x
    x = 210,495,891,536.18/521,763.12
  6. Step 6: Final answer
    x = 403,431.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.