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Finding the Fourth Proportional to 840.60, 1,156.82 and 723.96

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Solution

The fourth proportional to 840.60, 1,156.82 and 723.96 is: 996.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    840.60 : 1,156.82 = 723.96 : x
  2. Step 2: Convert to fraction form
    840.60/1,156.82 = 723.96/x
  3. Step 3: Cross multiply
    840.60x = 1,156.82 × 723.96
  4. Step 4: Simplify right side
    840.60x = 837,491.41
  5. Step 5: Solve for x
    x = 837,491.41/840.60
  6. Step 6: Final answer
    x = 996.30

Related Problems

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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.