Home / 811,445.86-1,217,279.52-338,020.50

Finding the Fourth Proportional to 811,445.86, 1,217,279.52 and 338,020.50

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Solution

The fourth proportional to 811,445.86, 1,217,279.52 and 338,020.50 is: 507,076.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,445.86 : 1,217,279.52 = 338,020.50 : x
  2. Step 2: Convert to fraction form
    811,445.86/1,217,279.52 = 338,020.50/x
  3. Step 3: Cross multiply
    811,445.86x = 1,217,279.52 × 338,020.50
  4. Step 4: Simplify right side
    811,445.86x = 411,465,431,990.16
  5. Step 5: Solve for x
    x = 411,465,431,990.16/811,445.86
  6. Step 6: Final answer
    x = 507,076.88

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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.