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Finding the Fourth Proportional to 660,357.20, 990,535.80 and 654,136.40

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Solution

The fourth proportional to 660,357.20, 990,535.80 and 654,136.40 is: 981,204.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,357.20 : 990,535.80 = 654,136.40 : x
  2. Step 2: Convert to fraction form
    660,357.20/990,535.80 = 654,136.40/x
  3. Step 3: Cross multiply
    660,357.20x = 990,535.80 × 654,136.40
  4. Step 4: Simplify right side
    660,357.20x = 647,945,522,283.12
  5. Step 5: Solve for x
    x = 647,945,522,283.12/660,357.20
  6. Step 6: Final answer
    x = 981,204.60

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1.5x scale

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.