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Finding the Fourth Proportional to 702,971.70, 1,053,679.95 and 387,654.90

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Solution

The fourth proportional to 702,971.70, 1,053,679.95 and 387,654.90 is: 581,053.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,971.70 : 1,053,679.95 = 387,654.90 : x
  2. Step 2: Convert to fraction form
    702,971.70/1,053,679.95 = 387,654.90/x
  3. Step 3: Cross multiply
    702,971.70x = 1,053,679.95 × 387,654.90
  4. Step 4: Simplify right side
    702,971.70x = 408,464,195,649.26
  5. Step 5: Solve for x
    x = 408,464,195,649.26/702,971.70
  6. Step 6: Final answer
    x = 581,053.54

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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.