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Finding the Fourth Proportional to 608.31, 839.44 and 342.76

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Solution

The fourth proportional to 608.31, 839.44 and 342.76 is: 472.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.31 : 839.44 = 342.76 : x
  2. Step 2: Convert to fraction form
    608.31/839.44 = 342.76/x
  3. Step 3: Cross multiply
    608.31x = 839.44 × 342.76
  4. Step 4: Simplify right side
    608.31x = 287,726.45
  5. Step 5: Solve for x
    x = 287,726.45/608.31
  6. Step 6: Final answer
    x = 472.99

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Find fourth proportional to 304.16, 419.72 and 171.38
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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.