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Finding the Fourth Proportional to 1,017.38, 1,526.17 and 286.95

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Solution

The fourth proportional to 1,017.38, 1,526.17 and 286.95 is: 430.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,017.38 : 1,526.17 = 286.95 : x
  2. Step 2: Convert to fraction form
    1,017.38/1,526.17 = 286.95/x
  3. Step 3: Cross multiply
    1,017.38x = 1,526.17 × 286.95
  4. Step 4: Simplify right side
    1,017.38x = 437,934.48
  5. Step 5: Solve for x
    x = 437,934.48/1,017.38
  6. Step 6: Final answer
    x = 430.45

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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.