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Finding the Fourth Proportional to 317,969,266.80, 476,953,900.20 and 172,472,530.80

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Solution

The fourth proportional to 317,969,266.80, 476,953,900.20 and 172,472,530.80 is: 258,708,796.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,969,266.80 : 476,953,900.20 = 172,472,530.80 : x
  2. Step 2: Convert to fraction form
    317,969,266.80/476,953,900.20 = 172,472,530.80/x
  3. Step 3: Cross multiply
    317,969,266.80x = 476,953,900.20 × 172,472,530.80
  4. Step 4: Simplify right side
    317,969,266.80x = 82,261,446,242,424,624
  5. Step 5: Solve for x
    x = 82,261,446,242,424,624/317,969,266.80
  6. Step 6: Final answer
    x = 258,708,796.20

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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.