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Finding the Fourth Proportional to 552.77, 762.77 and 319.85

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Solution

The fourth proportional to 552.77, 762.77 and 319.85 is: 441.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.77 : 762.77 = 319.85 : x
  2. Step 2: Convert to fraction form
    552.77/762.77 = 319.85/x
  3. Step 3: Cross multiply
    552.77x = 762.77 × 319.85
  4. Step 4: Simplify right side
    552.77x = 243,966.57
  5. Step 5: Solve for x
    x = 243,966.57/552.77
  6. Step 6: Final answer
    x = 441.36

Related Problems

Find fourth proportional to 276.38, 381.38 and 159.92
Half scale
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Double scale
Find fourth proportional to 553.77, 764.14 and 320.85
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.