Home / 420,615,125.12-630,358,724.06-327,354,708.12

Finding the Fourth Proportional to 420,615,125.12, 630,358,724.06 and 327,354,708.12

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Solution

The fourth proportional to 420,615,125.12, 630,358,724.06 and 327,354,708.12 is: 490,593,142.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,615,125.12 : 630,358,724.06 = 327,354,708.12 : x
  2. Step 2: Convert to fraction form
    420,615,125.12/630,358,724.06 = 327,354,708.12/x
  3. Step 3: Cross multiply
    420,615,125.12x = 630,358,724.06 × 327,354,708.12
  4. Step 4: Simplify right side
    420,615,125.12x = 206,350,896,123,920,128
  5. Step 5: Solve for x
    x = 206,350,896,123,920,128/420,615,125.12
  6. Step 6: Final answer
    x = 490,593,142.76

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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.