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Finding the Fourth Proportional to 608.87, 840.12 and 443.13

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Solution

The fourth proportional to 608.87, 840.12 and 443.13 is: 611.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.87 : 840.12 = 443.13 : x
  2. Step 2: Convert to fraction form
    608.87/840.12 = 443.13/x
  3. Step 3: Cross multiply
    608.87x = 840.12 × 443.13
  4. Step 4: Simplify right side
    608.87x = 372,282.38
  5. Step 5: Solve for x
    x = 372,282.38/608.87
  6. Step 6: Final answer
    x = 611.44

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Double scale
Find fourth proportional to 609.87, 841.50 and 444.13
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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.