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Finding the Fourth Proportional to 288,672.60, 433,018.80 and 88,991.40

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Solution

The fourth proportional to 288,672.60, 433,018.80 and 88,991.40 is: 133,490.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,672.60 : 433,018.80 = 88,991.40 : x
  2. Step 2: Convert to fraction form
    288,672.60/433,018.80 = 88,991.40/x
  3. Step 3: Cross multiply
    288,672.60x = 433,018.80 × 88,991.40
  4. Step 4: Simplify right side
    288,672.60x = 38,534,949,238.32
  5. Step 5: Solve for x
    x = 38,534,949,238.32/288,672.60
  6. Step 6: Final answer
    x = 133,490.15

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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.