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Finding the Fourth Proportional to 388,614.03, 536,279.28 and 216,531.30

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Solution

The fourth proportional to 388,614.03, 536,279.28 and 216,531.30 is: 298,808.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,614.03 : 536,279.28 = 216,531.30 : x
  2. Step 2: Convert to fraction form
    388,614.03/536,279.28 = 216,531.30/x
  3. Step 3: Cross multiply
    388,614.03x = 536,279.28 × 216,531.30
  4. Step 4: Simplify right side
    388,614.03x = 116,121,250,570.22
  5. Step 5: Solve for x
    x = 116,121,250,570.22/388,614.03
  6. Step 6: Final answer
    x = 298,808.69

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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.