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Finding the Fourth Proportional to 660,376.40, 990,564.60 and 656,439.80

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Solution

The fourth proportional to 660,376.40, 990,564.60 and 656,439.80 is: 984,659.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,376.40 : 990,564.60 = 656,439.80 : x
  2. Step 2: Convert to fraction form
    660,376.40/990,564.60 = 656,439.80/x
  3. Step 3: Cross multiply
    660,376.40x = 990,564.60 × 656,439.80
  4. Step 4: Simplify right side
    660,376.40x = 650,246,027,911.08
  5. Step 5: Solve for x
    x = 650,246,027,911.08/660,376.40
  6. Step 6: Final answer
    x = 984,659.70

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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.