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Finding the Fourth Proportional to 723.04, 997.32 and 678.80

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Solution

The fourth proportional to 723.04, 997.32 and 678.80 is: 936.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.04 : 997.32 = 678.80 : x
  2. Step 2: Convert to fraction form
    723.04/997.32 = 678.80/x
  3. Step 3: Cross multiply
    723.04x = 997.32 × 678.80
  4. Step 4: Simplify right side
    723.04x = 676,980.82
  5. Step 5: Solve for x
    x = 676,980.82/723.04
  6. Step 6: Final answer
    x = 936.30

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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.