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Finding the Fourth Proportional to 385,592.40, 532,111.68 and 215,832.60

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Solution

The fourth proportional to 385,592.40, 532,111.68 and 215,832.60 is: 297,845.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,592.40 : 532,111.68 = 215,832.60 : x
  2. Step 2: Convert to fraction form
    385,592.40/532,111.68 = 215,832.60/x
  3. Step 3: Cross multiply
    385,592.40x = 532,111.68 × 215,832.60
  4. Step 4: Simplify right side
    385,592.40x = 114,847,047,384.77
  5. Step 5: Solve for x
    x = 114,847,047,384.77/385,592.40
  6. Step 6: Final answer
    x = 297,845.72

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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.