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Finding the Fourth Proportional to 317,891.80, 476,837.70 and 266,570.20

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Solution

The fourth proportional to 317,891.80, 476,837.70 and 266,570.20 is: 399,855.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,891.80 : 476,837.70 = 266,570.20 : x
  2. Step 2: Convert to fraction form
    317,891.80/476,837.70 = 266,570.20/x
  3. Step 3: Cross multiply
    317,891.80x = 476,837.70 × 266,570.20
  4. Step 4: Simplify right side
    317,891.80x = 127,110,721,056.54
  5. Step 5: Solve for x
    x = 127,110,721,056.54/317,891.80
  6. Step 6: Final answer
    x = 399,855.30

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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.