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Finding the Fourth Proportional to 675.99, 1,015.11 and 457.29

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Solution

The fourth proportional to 675.99, 1,015.11 and 457.29 is: 686.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.99 : 1,015.11 = 457.29 : x
  2. Step 2: Convert to fraction form
    675.99/1,015.11 = 457.29/x
  3. Step 3: Cross multiply
    675.99x = 1,015.11 × 457.29
  4. Step 4: Simplify right side
    675.99x = 464,199.65
  5. Step 5: Solve for x
    x = 464,199.65/675.99
  6. Step 6: Final answer
    x = 686.70

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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.