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Finding the Fourth Proportional to 426,543, 639,812.67 and 173,767.11

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Solution

The fourth proportional to 426,543, 639,812.67 and 173,767.11 is: 260,649.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,543 : 639,812.67 = 173,767.11 : x
  2. Step 2: Convert to fraction form
    426,543/639,812.67 = 173,767.11/x
  3. Step 3: Cross multiply
    426,543x = 639,812.67 × 173,767.11
  4. Step 4: Simplify right side
    426,543x = 111,178,398,607.28
  5. Step 5: Solve for x
    x = 111,178,398,607.28/426,543
  6. Step 6: Final answer
    x = 260,649.92

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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.