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Finding the Fourth Proportional to 607.91, 839.18 and 443.38

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Solution

The fourth proportional to 607.91, 839.18 and 443.38 is: 612.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.91 : 839.18 = 443.38 : x
  2. Step 2: Convert to fraction form
    607.91/839.18 = 443.38/x
  3. Step 3: Cross multiply
    607.91x = 839.18 × 443.38
  4. Step 4: Simplify right side
    607.91x = 372,074.64
  5. Step 5: Solve for x
    x = 372,074.64/607.91
  6. Step 6: Final answer
    x = 612.06

Related Problems

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Double scale
Find fourth proportional to 608.91, 840.56 and 444.38
Similar ratio
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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.