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Finding the Fourth Proportional to 659,451.10, 989,504.70 and 260,104.90

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Solution

The fourth proportional to 659,451.10, 989,504.70 and 260,104.90 is: 390,286.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,451.10 : 989,504.70 = 260,104.90 : x
  2. Step 2: Convert to fraction form
    659,451.10/989,504.70 = 260,104.90/x
  3. Step 3: Cross multiply
    659,451.10x = 989,504.70 × 260,104.90
  4. Step 4: Simplify right side
    659,451.10x = 257,375,021,043.03
  5. Step 5: Solve for x
    x = 257,375,021,043.03/659,451.10
  6. Step 6: Final answer
    x = 390,286.74

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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.