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Finding the Fourth Proportional to 287,591.60, 431,063.40 and 137,903.60

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Solution

The fourth proportional to 287,591.60, 431,063.40 and 137,903.60 is: 206,700.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,591.60 : 431,063.40 = 137,903.60 : x
  2. Step 2: Convert to fraction form
    287,591.60/431,063.40 = 137,903.60/x
  3. Step 3: Cross multiply
    287,591.60x = 431,063.40 × 137,903.60
  4. Step 4: Simplify right side
    287,591.60x = 59,445,194,688.24
  5. Step 5: Solve for x
    x = 59,445,194,688.24/287,591.60
  6. Step 6: Final answer
    x = 206,700.04

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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.