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Finding the Fourth Proportional to 834.57, 1,152.18 and 555.19

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Solution

The fourth proportional to 834.57, 1,152.18 and 555.19 is: 766.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.57 : 1,152.18 = 555.19 : x
  2. Step 2: Convert to fraction form
    834.57/1,152.18 = 555.19/x
  3. Step 3: Cross multiply
    834.57x = 1,152.18 × 555.19
  4. Step 4: Simplify right side
    834.57x = 639,673.05
  5. Step 5: Solve for x
    x = 639,673.05/834.57
  6. Step 6: Final answer
    x = 766.47

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Double scale
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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.