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Finding the Fourth Proportional to 1,010.63, 1,515.68 and 280.04

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Solution

The fourth proportional to 1,010.63, 1,515.68 and 280.04 is: 419.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010.63 : 1,515.68 = 280.04 : x
  2. Step 2: Convert to fraction form
    1,010.63/1,515.68 = 280.04/x
  3. Step 3: Cross multiply
    1,010.63x = 1,515.68 × 280.04
  4. Step 4: Simplify right side
    1,010.63x = 424,442.05
  5. Step 5: Solve for x
    x = 424,442.05/1,010.63
  6. Step 6: Final answer
    x = 419.98

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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.