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Finding the Fourth Proportional to 713.08, 984.06 and 398.38

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Solution

The fourth proportional to 713.08, 984.06 and 398.38 is: 549.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.08 : 984.06 = 398.38 : x
  2. Step 2: Convert to fraction form
    713.08/984.06 = 398.38/x
  3. Step 3: Cross multiply
    713.08x = 984.06 × 398.38
  4. Step 4: Simplify right side
    713.08x = 392,029.82
  5. Step 5: Solve for x
    x = 392,029.82/713.08
  6. Step 6: Final answer
    x = 549.77

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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.