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Finding the Fourth Proportional to 555.38, 766.38 and 319.36

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Solution

The fourth proportional to 555.38, 766.38 and 319.36 is: 440.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.38 : 766.38 = 319.36 : x
  2. Step 2: Convert to fraction form
    555.38/766.38 = 319.36/x
  3. Step 3: Cross multiply
    555.38x = 766.38 × 319.36
  4. Step 4: Simplify right side
    555.38x = 244,751.12
  5. Step 5: Solve for x
    x = 244,751.12/555.38
  6. Step 6: Final answer
    x = 440.69

Related Problems

Find fourth proportional to 277.69, 383.19 and 159.68
Half scale
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Double scale
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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.