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Finding the Fourth Proportional to 835.96, 1,153.68 and 555.70

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Solution

The fourth proportional to 835.96, 1,153.68 and 555.70 is: 766.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.96 : 1,153.68 = 555.70 : x
  2. Step 2: Convert to fraction form
    835.96/1,153.68 = 555.70/x
  3. Step 3: Cross multiply
    835.96x = 1,153.68 × 555.70
  4. Step 4: Simplify right side
    835.96x = 641,099.98
  5. Step 5: Solve for x
    x = 641,099.98/835.96
  6. Step 6: Final answer
    x = 766.90

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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.