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Finding the Fourth Proportional to 719.61, 993.04 and 404.88

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Solution

The fourth proportional to 719.61, 993.04 and 404.88 is: 558.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.61 : 993.04 = 404.88 : x
  2. Step 2: Convert to fraction form
    719.61/993.04 = 404.88/x
  3. Step 3: Cross multiply
    719.61x = 993.04 × 404.88
  4. Step 4: Simplify right side
    719.61x = 402,061.02
  5. Step 5: Solve for x
    x = 402,061.02/719.61
  6. Step 6: Final answer
    x = 558.72

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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.