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Finding the Fourth Proportional to 628,788.78, 867,701.30 and 342,309.87

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Solution

The fourth proportional to 628,788.78, 867,701.30 and 342,309.87 is: 472,372.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,788.78 : 867,701.30 = 342,309.87 : x
  2. Step 2: Convert to fraction form
    628,788.78/867,701.30 = 342,309.87/x
  3. Step 3: Cross multiply
    628,788.78x = 867,701.30 × 342,309.87
  4. Step 4: Simplify right side
    628,788.78x = 297,022,717,490.28
  5. Step 5: Solve for x
    x = 297,022,717,490.28/628,788.78
  6. Step 6: Final answer
    x = 472,372.80

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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.