Home / 861,131.78-1,291,988.04-381,294.07

Finding the Fourth Proportional to 861,131.78, 1,291,988.04 and 381,294.07

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Solution

The fourth proportional to 861,131.78, 1,291,988.04 and 381,294.07 is: 572,069.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,131.78 : 1,291,988.04 = 381,294.07 : x
  2. Step 2: Convert to fraction form
    861,131.78/1,291,988.04 = 381,294.07/x
  3. Step 3: Cross multiply
    861,131.78x = 1,291,988.04 × 381,294.07
  4. Step 4: Simplify right side
    861,131.78x = 492,627,371,702.98
  5. Step 5: Solve for x
    x = 492,627,371,702.98/861,131.78
  6. Step 6: Final answer
    x = 572,069.67

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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.