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Finding the Fourth Proportional to 815.46, 1,125.38 and 483.77

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Solution

The fourth proportional to 815.46, 1,125.38 and 483.77 is: 667.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    815.46 : 1,125.38 = 483.77 : x
  2. Step 2: Convert to fraction form
    815.46/1,125.38 = 483.77/x
  3. Step 3: Cross multiply
    815.46x = 1,125.38 × 483.77
  4. Step 4: Simplify right side
    815.46x = 544,417.04
  5. Step 5: Solve for x
    x = 544,417.04/815.46
  6. Step 6: Final answer
    x = 667.62

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Double scale
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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.