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Finding the Fourth Proportional to 1,017.47, 1,526.07 and 287.10

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Solution

The fourth proportional to 1,017.47, 1,526.07 and 287.10 is: 430.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,017.47 : 1,526.07 = 287.10 : x
  2. Step 2: Convert to fraction form
    1,017.47/1,526.07 = 287.10/x
  3. Step 3: Cross multiply
    1,017.47x = 1,526.07 × 287.10
  4. Step 4: Simplify right side
    1,017.47x = 438,134.70
  5. Step 5: Solve for x
    x = 438,134.70/1,017.47
  6. Step 6: Final answer
    x = 430.61

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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.