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Finding the Fourth Proportional to 628,893.90, 867,889.17 and 342,429.69

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Solution

The fourth proportional to 628,893.90, 867,889.17 and 342,429.69 is: 472,561.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,893.90 : 867,889.17 = 342,429.69 : x
  2. Step 2: Convert to fraction form
    628,893.90/867,889.17 = 342,429.69/x
  3. Step 3: Cross multiply
    628,893.90x = 867,889.17 × 342,429.69
  4. Step 4: Simplify right side
    628,893.90x = 297,191,019,437.46
  5. Step 5: Solve for x
    x = 297,191,019,437.46/628,893.90
  6. Step 6: Final answer
    x = 472,561.46

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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.