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Finding the Fourth Proportional to 687.08, 948.22 and 425.18

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Solution

The fourth proportional to 687.08, 948.22 and 425.18 is: 586.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.08 : 948.22 = 425.18 : x
  2. Step 2: Convert to fraction form
    687.08/948.22 = 425.18/x
  3. Step 3: Cross multiply
    687.08x = 948.22 × 425.18
  4. Step 4: Simplify right side
    687.08x = 403,158.38
  5. Step 5: Solve for x
    x = 403,158.38/687.08
  6. Step 6: Final answer
    x = 586.77

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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.