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Finding the Fourth Proportional to 660,339.40, 990,509.10 and 656,402.80

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Solution

The fourth proportional to 660,339.40, 990,509.10 and 656,402.80 is: 984,604.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,339.40 : 990,509.10 = 656,402.80 : x
  2. Step 2: Convert to fraction form
    660,339.40/990,509.10 = 656,402.80/x
  3. Step 3: Cross multiply
    660,339.40x = 990,509.10 × 656,402.80
  4. Step 4: Simplify right side
    660,339.40x = 650,172,946,665.48
  5. Step 5: Solve for x
    x = 650,172,946,665.48/660,339.40
  6. Step 6: Final answer
    x = 984,604.20

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Similar ratio
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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.