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Finding the Fourth Proportional to 487,718.80, 731,578.20 and 369,620.80

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Solution

The fourth proportional to 487,718.80, 731,578.20 and 369,620.80 is: 554,431.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,718.80 : 731,578.20 = 369,620.80 : x
  2. Step 2: Convert to fraction form
    487,718.80/731,578.20 = 369,620.80/x
  3. Step 3: Cross multiply
    487,718.80x = 731,578.20 × 369,620.80
  4. Step 4: Simplify right side
    487,718.80x = 270,406,519,546.56
  5. Step 5: Solve for x
    x = 270,406,519,546.56/487,718.80
  6. Step 6: Final answer
    x = 554,431.20

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Similar ratio
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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.