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Finding the Fourth Proportional to 918,491.20, 1,375,279.20 and 584,257.60

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Solution

The fourth proportional to 918,491.20, 1,375,279.20 and 584,257.60 is: 874,823.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,491.20 : 1,375,279.20 = 584,257.60 : x
  2. Step 2: Convert to fraction form
    918,491.20/1,375,279.20 = 584,257.60/x
  3. Step 3: Cross multiply
    918,491.20x = 1,375,279.20 × 584,257.60
  4. Step 4: Simplify right side
    918,491.20x = 803,517,324,721.92
  5. Step 5: Solve for x
    x = 803,517,324,721.92/918,491.20
  6. Step 6: Final answer
    x = 874,823.11

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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.