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Finding the Fourth Proportional to 860.42, 1,186.26 and 624.18

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Solution

The fourth proportional to 860.42, 1,186.26 and 624.18 is: 860.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.42 : 1,186.26 = 624.18 : x
  2. Step 2: Convert to fraction form
    860.42/1,186.26 = 624.18/x
  3. Step 3: Cross multiply
    860.42x = 1,186.26 × 624.18
  4. Step 4: Simplify right side
    860.42x = 740,439.77
  5. Step 5: Solve for x
    x = 740,439.77/860.42
  6. Step 6: Final answer
    x = 860.56

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Double scale
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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.