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Finding the Fourth Proportional to 659,470.80, 989,465.40 and 260,043.60

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Solution

The fourth proportional to 659,470.80, 989,465.40 and 260,043.60 is: 390,167.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,470.80 : 989,465.40 = 260,043.60 : x
  2. Step 2: Convert to fraction form
    659,470.80/989,465.40 = 260,043.60/x
  3. Step 3: Cross multiply
    659,470.80x = 989,465.40 × 260,043.60
  4. Step 4: Simplify right side
    659,470.80x = 257,304,144,691.44
  5. Step 5: Solve for x
    x = 257,304,144,691.44/659,470.80
  6. Step 6: Final answer
    x = 390,167.61

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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.