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Finding the Fourth Proportional to 709,916.22, 979,679.48 and 387,626.13

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Solution

The fourth proportional to 709,916.22, 979,679.48 and 387,626.13 is: 534,921.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,916.22 : 979,679.48 = 387,626.13 : x
  2. Step 2: Convert to fraction form
    709,916.22/979,679.48 = 387,626.13/x
  3. Step 3: Cross multiply
    709,916.22x = 979,679.48 × 387,626.13
  4. Step 4: Simplify right side
    709,916.22x = 379,749,363,534.68
  5. Step 5: Solve for x
    x = 379,749,363,534.68/709,916.22
  6. Step 6: Final answer
    x = 534,921.38

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Double scale
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1.5x scale

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.