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Finding the Fourth Proportional to 543,722.72, 816,082.20 and 291,288.20

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Solution

The fourth proportional to 543,722.72, 816,082.20 and 291,288.20 is: 437,199.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,722.72 : 816,082.20 = 291,288.20 : x
  2. Step 2: Convert to fraction form
    543,722.72/816,082.20 = 291,288.20/x
  3. Step 3: Cross multiply
    543,722.72x = 816,082.20 × 291,288.20
  4. Step 4: Simplify right side
    543,722.72x = 237,715,115,090.04
  5. Step 5: Solve for x
    x = 237,715,115,090.04/543,722.72
  6. Step 6: Final answer
    x = 437,199.16

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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.