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Finding the Fourth Proportional to 480.30, 719.92 and 315.83

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Solution

The fourth proportional to 480.30, 719.92 and 315.83 is: 473.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.30 : 719.92 = 315.83 : x
  2. Step 2: Convert to fraction form
    480.30/719.92 = 315.83/x
  3. Step 3: Cross multiply
    480.30x = 719.92 × 315.83
  4. Step 4: Simplify right side
    480.30x = 227,374.53
  5. Step 5: Solve for x
    x = 227,374.53/480.30
  6. Step 6: Final answer
    x = 473.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.