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Finding the Fourth Proportional to 487,040.66, 672,057.90 and 269,219.91

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Solution

The fourth proportional to 487,040.66, 672,057.90 and 269,219.91 is: 371,491.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,040.66 : 672,057.90 = 269,219.91 : x
  2. Step 2: Convert to fraction form
    487,040.66/672,057.90 = 269,219.91/x
  3. Step 3: Cross multiply
    487,040.66x = 672,057.90 × 269,219.91
  4. Step 4: Simplify right side
    487,040.66x = 180,931,369,873.01
  5. Step 5: Solve for x
    x = 180,931,369,873.01/487,040.66
  6. Step 6: Final answer
    x = 371,491.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.