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Finding the Fourth Proportional to 758.76, 1,048.32 and 660.48

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Solution

The fourth proportional to 758.76, 1,048.32 and 660.48 is: 912.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.76 : 1,048.32 = 660.48 : x
  2. Step 2: Convert to fraction form
    758.76/1,048.32 = 660.48/x
  3. Step 3: Cross multiply
    758.76x = 1,048.32 × 660.48
  4. Step 4: Simplify right side
    758.76x = 692,394.39
  5. Step 5: Solve for x
    x = 692,394.39/758.76
  6. Step 6: Final answer
    x = 912.53

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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.