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Finding the Fourth Proportional to 628,797.78, 867,713.72 and 342,318.87

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Solution

The fourth proportional to 628,797.78, 867,713.72 and 342,318.87 is: 472,385.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,797.78 : 867,713.72 = 342,318.87 : x
  2. Step 2: Convert to fraction form
    628,797.78/867,713.72 = 342,318.87/x
  3. Step 3: Cross multiply
    628,797.78x = 867,713.72 × 342,318.87
  4. Step 4: Simplify right side
    628,797.78x = 297,034,778,402.30
  5. Step 5: Solve for x
    x = 297,034,778,402.30/628,797.78
  6. Step 6: Final answer
    x = 472,385.22

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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.