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Finding the Fourth Proportional to 1,191.50, 1,787.48 and 575.63

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Solution

The fourth proportional to 1,191.50, 1,787.48 and 575.63 is: 863.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191.50 : 1,787.48 = 575.63 : x
  2. Step 2: Convert to fraction form
    1,191.50/1,787.48 = 575.63/x
  3. Step 3: Cross multiply
    1,191.50x = 1,787.48 × 575.63
  4. Step 4: Simplify right side
    1,191.50x = 1,028,927.11
  5. Step 5: Solve for x
    x = 1,028,927.11/1,191.50
  6. Step 6: Final answer
    x = 863.56

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1.5x scale

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.