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Finding the Fourth Proportional to 814.57, 1,123.61 and 482.77

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Solution

The fourth proportional to 814.57, 1,123.61 and 482.77 is: 665.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.57 : 1,123.61 = 482.77 : x
  2. Step 2: Convert to fraction form
    814.57/1,123.61 = 482.77/x
  3. Step 3: Cross multiply
    814.57x = 1,123.61 × 482.77
  4. Step 4: Simplify right side
    814.57x = 542,437.87
  5. Step 5: Solve for x
    x = 542,437.87/814.57
  6. Step 6: Final answer
    x = 665.92

Related Problems

Find fourth proportional to 407.29, 561.80 and 241.38
Half scale
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Double scale
Find fourth proportional to 815.57, 1,124.98 and 483.77
Similar ratio
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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.