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Finding the Fourth Proportional to 539.32, 744.15 and 342.76

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Solution

The fourth proportional to 539.32, 744.15 and 342.76 is: 472.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.32 : 744.15 = 342.76 : x
  2. Step 2: Convert to fraction form
    539.32/744.15 = 342.76/x
  3. Step 3: Cross multiply
    539.32x = 744.15 × 342.76
  4. Step 4: Simplify right side
    539.32x = 255,064.85
  5. Step 5: Solve for x
    x = 255,064.85/539.32
  6. Step 6: Final answer
    x = 472.94

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Find fourth proportional to 269.66, 372.08 and 171.38
Half scale
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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.