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Finding the Fourth Proportional to 830.96, 1,245.90 and 557.24

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Solution

The fourth proportional to 830.96, 1,245.90 and 557.24 is: 835.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.96 : 1,245.90 = 557.24 : x
  2. Step 2: Convert to fraction form
    830.96/1,245.90 = 557.24/x
  3. Step 3: Cross multiply
    830.96x = 1,245.90 × 557.24
  4. Step 4: Simplify right side
    830.96x = 694,265.32
  5. Step 5: Solve for x
    x = 694,265.32/830.96
  6. Step 6: Final answer
    x = 835.50

Related Problems

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