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Finding the Fourth Proportional to 385,587.64, 532,110.51 and 215,821.78

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Solution

The fourth proportional to 385,587.64, 532,110.51 and 215,821.78 is: 297,833.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,587.64 : 532,110.51 = 215,821.78 : x
  2. Step 2: Convert to fraction form
    385,587.64/532,110.51 = 215,821.78/x
  3. Step 3: Cross multiply
    385,587.64x = 532,110.51 × 215,821.78
  4. Step 4: Simplify right side
    385,587.64x = 114,841,037,424.91
  5. Step 5: Solve for x
    x = 114,841,037,424.91/385,587.64
  6. Step 6: Final answer
    x = 297,833.81

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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.