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Finding the Fourth Proportional to 660,355.20, 990,532.80 and 344,908.80

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Solution

The fourth proportional to 660,355.20, 990,532.80 and 344,908.80 is: 517,363.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,355.20 : 990,532.80 = 344,908.80 : x
  2. Step 2: Convert to fraction form
    660,355.20/990,532.80 = 344,908.80/x
  3. Step 3: Cross multiply
    660,355.20x = 990,532.80 × 344,908.80
  4. Step 4: Simplify right side
    660,355.20x = 341,643,479,408.64
  5. Step 5: Solve for x
    x = 341,643,479,408.64/660,355.20
  6. Step 6: Final answer
    x = 517,363.20

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Similar ratio
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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.