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Finding the Fourth Proportional to 1,017.95, 1,524.61 and 647.75

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Solution

The fourth proportional to 1,017.95, 1,524.61 and 647.75 is: 970.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,017.95 : 1,524.61 = 647.75 : x
  2. Step 2: Convert to fraction form
    1,017.95/1,524.61 = 647.75/x
  3. Step 3: Cross multiply
    1,017.95x = 1,524.61 × 647.75
  4. Step 4: Simplify right side
    1,017.95x = 987,566.13
  5. Step 5: Solve for x
    x = 987,566.13/1,017.95
  6. Step 6: Final answer
    x = 970.16

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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.