Home / 861,311.84-1,291,968.17-387,443.57

Finding the Fourth Proportional to 861,311.84, 1,291,968.17 and 387,443.57

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Solution

The fourth proportional to 861,311.84, 1,291,968.17 and 387,443.57 is: 581,165.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,311.84 : 1,291,968.17 = 387,443.57 : x
  2. Step 2: Convert to fraction form
    861,311.84/1,291,968.17 = 387,443.57/x
  3. Step 3: Cross multiply
    861,311.84x = 1,291,968.17 × 387,443.57
  4. Step 4: Simplify right side
    861,311.84x = 500,564,758,173.95
  5. Step 5: Solve for x
    x = 500,564,758,173.95/861,311.84
  6. Step 6: Final answer
    x = 581,165.54

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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.