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Finding the Fourth Proportional to 659,470.60, 989,205.90 and 620,104.60

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Solution

The fourth proportional to 659,470.60, 989,205.90 and 620,104.60 is: 930,156.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,470.60 : 989,205.90 = 620,104.60 : x
  2. Step 2: Convert to fraction form
    659,470.60/989,205.90 = 620,104.60/x
  3. Step 3: Cross multiply
    659,470.60x = 989,205.90 × 620,104.60
  4. Step 4: Simplify right side
    659,470.60x = 613,411,128,937.14
  5. Step 5: Solve for x
    x = 613,411,128,937.14/659,470.60
  6. Step 6: Final answer
    x = 930,156.90

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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.