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Finding the Fourth Proportional to 834.89, 1,152.61 and 555.50

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Solution

The fourth proportional to 834.89, 1,152.61 and 555.50 is: 766.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.89 : 1,152.61 = 555.50 : x
  2. Step 2: Convert to fraction form
    834.89/1,152.61 = 555.50/x
  3. Step 3: Cross multiply
    834.89x = 1,152.61 × 555.50
  4. Step 4: Simplify right side
    834.89x = 640,274.86
  5. Step 5: Solve for x
    x = 640,274.86/834.89
  6. Step 6: Final answer
    x = 766.90

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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.