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Finding the Fourth Proportional to 453,079.80, 678,842.10 and 215,911.80

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Solution

The fourth proportional to 453,079.80, 678,842.10 and 215,911.80 is: 323,497.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,079.80 : 678,842.10 = 215,911.80 : x
  2. Step 2: Convert to fraction form
    453,079.80/678,842.10 = 215,911.80/x
  3. Step 3: Cross multiply
    453,079.80x = 678,842.10 × 215,911.80
  4. Step 4: Simplify right side
    453,079.80x = 146,570,019,726.78
  5. Step 5: Solve for x
    x = 146,570,019,726.78/453,079.80
  6. Step 6: Final answer
    x = 323,497.14

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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.