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Finding the Fourth Proportional to 660,002.10, 990,003.15 and 394,062.90

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Solution

The fourth proportional to 660,002.10, 990,003.15 and 394,062.90 is: 591,094.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,002.10 : 990,003.15 = 394,062.90 : x
  2. Step 2: Convert to fraction form
    660,002.10/990,003.15 = 394,062.90/x
  3. Step 3: Cross multiply
    660,002.10x = 990,003.15 × 394,062.90
  4. Step 4: Simplify right side
    660,002.10x = 390,123,512,298.14
  5. Step 5: Solve for x
    x = 390,123,512,298.14/660,002.10
  6. Step 6: Final answer
    x = 591,094.35

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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.