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Finding the Fourth Proportional to 858.60, 1,184.18 and 622.58

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Solution

The fourth proportional to 858.60, 1,184.18 and 622.58 is: 858.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.60 : 1,184.18 = 622.58 : x
  2. Step 2: Convert to fraction form
    858.60/1,184.18 = 622.58/x
  3. Step 3: Cross multiply
    858.60x = 1,184.18 × 622.58
  4. Step 4: Simplify right side
    858.60x = 737,246.78
  5. Step 5: Solve for x
    x = 737,246.78/858.60
  6. Step 6: Final answer
    x = 858.66

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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.