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Finding the Fourth Proportional to 840.41, 1,260.18 and 493.85

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Solution

The fourth proportional to 840.41, 1,260.18 and 493.85 is: 740.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    840.41 : 1,260.18 = 493.85 : x
  2. Step 2: Convert to fraction form
    840.41/1,260.18 = 493.85/x
  3. Step 3: Cross multiply
    840.41x = 1,260.18 × 493.85
  4. Step 4: Simplify right side
    840.41x = 622,337.34
  5. Step 5: Solve for x
    x = 622,337.34/840.41
  6. Step 6: Final answer
    x = 740.52

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.