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Finding the Fourth Proportional to 664,386.80, 996,677.40 and 215,031.20

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Solution

The fourth proportional to 664,386.80, 996,677.40 and 215,031.20 is: 322,578.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,386.80 : 996,677.40 = 215,031.20 : x
  2. Step 2: Convert to fraction form
    664,386.80/996,677.40 = 215,031.20/x
  3. Step 3: Cross multiply
    664,386.80x = 996,677.40 × 215,031.20
  4. Step 4: Simplify right side
    664,386.80x = 214,316,737,334.88
  5. Step 5: Solve for x
    x = 214,316,737,334.88/664,386.80
  6. Step 6: Final answer
    x = 322,578.26

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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.