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Finding the Fourth Proportional to 479.60, 717.98 and 296.40

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Solution

The fourth proportional to 479.60, 717.98 and 296.40 is: 443.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.60 : 717.98 = 296.40 : x
  2. Step 2: Convert to fraction form
    479.60/717.98 = 296.40/x
  3. Step 3: Cross multiply
    479.60x = 717.98 × 296.40
  4. Step 4: Simplify right side
    479.60x = 212,807.79
  5. Step 5: Solve for x
    x = 212,807.79/479.60
  6. Step 6: Final answer
    x = 443.72

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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.