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Finding the Fourth Proportional to 834.89, 1,152.55 and 555.59

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Solution

The fourth proportional to 834.89, 1,152.55 and 555.59 is: 766.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.89 : 1,152.55 = 555.59 : x
  2. Step 2: Convert to fraction form
    834.89/1,152.55 = 555.59/x
  3. Step 3: Cross multiply
    834.89x = 1,152.55 × 555.59
  4. Step 4: Simplify right side
    834.89x = 640,340.98
  5. Step 5: Solve for x
    x = 640,340.98/834.89
  6. Step 6: Final answer
    x = 766.98

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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.