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Finding the Fourth Proportional to 787.24, 1,085.80 and 752.34

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Solution

The fourth proportional to 787.24, 1,085.80 and 752.34 is: 1,037.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    787.24 : 1,085.80 = 752.34 : x
  2. Step 2: Convert to fraction form
    787.24/1,085.80 = 752.34/x
  3. Step 3: Cross multiply
    787.24x = 1,085.80 × 752.34
  4. Step 4: Simplify right side
    787.24x = 816,890.77
  5. Step 5: Solve for x
    x = 816,890.77/787.24
  6. Step 6: Final answer
    x = 1,037.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.