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Finding the Fourth Proportional to 611,229.36, 917,031.76 and 291,788.88

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Solution

The fourth proportional to 611,229.36, 917,031.76 and 291,788.88 is: 437,772.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,229.36 : 917,031.76 = 291,788.88 : x
  2. Step 2: Convert to fraction form
    611,229.36/917,031.76 = 291,788.88/x
  3. Step 3: Cross multiply
    611,229.36x = 917,031.76 × 291,788.88
  4. Step 4: Simplify right side
    611,229.36x = 267,579,670,174.83
  5. Step 5: Solve for x
    x = 267,579,670,174.83/611,229.36
  6. Step 6: Final answer
    x = 437,772.93

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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.