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Finding the Fourth Proportional to 1,002.45, 1,382.47 and 899.17

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Solution

The fourth proportional to 1,002.45, 1,382.47 and 899.17 is: 1,240.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,002.45 : 1,382.47 = 899.17 : x
  2. Step 2: Convert to fraction form
    1,002.45/1,382.47 = 899.17/x
  3. Step 3: Cross multiply
    1,002.45x = 1,382.47 × 899.17
  4. Step 4: Simplify right side
    1,002.45x = 1,243,075.55
  5. Step 5: Solve for x
    x = 1,243,075.55/1,002.45
  6. Step 6: Final answer
    x = 1,240.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.