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Finding the Fourth Proportional to 317,587.80, 476,381.70 and 266,266.20

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Solution

The fourth proportional to 317,587.80, 476,381.70 and 266,266.20 is: 399,399.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,587.80 : 476,381.70 = 266,266.20 : x
  2. Step 2: Convert to fraction form
    317,587.80/476,381.70 = 266,266.20/x
  3. Step 3: Cross multiply
    317,587.80x = 476,381.70 × 266,266.20
  4. Step 4: Simplify right side
    317,587.80x = 126,844,345,008.54
  5. Step 5: Solve for x
    x = 126,844,345,008.54/317,587.80
  6. Step 6: Final answer
    x = 399,399.30

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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.