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Finding the Fourth Proportional to 1,017.88, 1,526.82 and 287.45

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Solution

The fourth proportional to 1,017.88, 1,526.82 and 287.45 is: 431.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,017.88 : 1,526.82 = 287.45 : x
  2. Step 2: Convert to fraction form
    1,017.88/1,526.82 = 287.45/x
  3. Step 3: Cross multiply
    1,017.88x = 1,526.82 × 287.45
  4. Step 4: Simplify right side
    1,017.88x = 438,884.41
  5. Step 5: Solve for x
    x = 438,884.41/1,017.88
  6. Step 6: Final answer
    x = 431.18

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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.