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Finding the Fourth Proportional to 660,348.40, 990,522.60 and 656,411.80

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Solution

The fourth proportional to 660,348.40, 990,522.60 and 656,411.80 is: 984,617.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,348.40 : 990,522.60 = 656,411.80 : x
  2. Step 2: Convert to fraction form
    660,348.40/990,522.60 = 656,411.80/x
  3. Step 3: Cross multiply
    660,348.40x = 990,522.60 × 656,411.80
  4. Step 4: Simplify right side
    660,348.40x = 650,190,722,806.68
  5. Step 5: Solve for x
    x = 650,190,722,806.68/660,348.40
  6. Step 6: Final answer
    x = 984,617.70

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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.