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Finding the Fourth Proportional to 818.84, 1,129.05 and 652.92

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Solution

The fourth proportional to 818.84, 1,129.05 and 652.92 is: 900.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.84 : 1,129.05 = 652.92 : x
  2. Step 2: Convert to fraction form
    818.84/1,129.05 = 652.92/x
  3. Step 3: Cross multiply
    818.84x = 1,129.05 × 652.92
  4. Step 4: Simplify right side
    818.84x = 737,179.33
  5. Step 5: Solve for x
    x = 737,179.33/818.84
  6. Step 6: Final answer
    x = 900.28

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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.