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Finding the Fourth Proportional to 628,731.72, 867,649.88 and 342,253.96

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Solution

The fourth proportional to 628,731.72, 867,649.88 and 342,253.96 is: 472,310.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,731.72 : 867,649.88 = 342,253.96 : x
  2. Step 2: Convert to fraction form
    628,731.72/867,649.88 = 342,253.96/x
  3. Step 3: Cross multiply
    628,731.72x = 867,649.88 × 342,253.96
  4. Step 4: Simplify right side
    628,731.72x = 296,956,607,323.53
  5. Step 5: Solve for x
    x = 296,956,607,323.53/628,731.72
  6. Step 6: Final answer
    x = 472,310.52

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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.