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Finding the Fourth Proportional to 555.16, 830.76 and 479.04

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Solution

The fourth proportional to 555.16, 830.76 and 479.04 is: 716.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.16 : 830.76 = 479.04 : x
  2. Step 2: Convert to fraction form
    555.16/830.76 = 479.04/x
  3. Step 3: Cross multiply
    555.16x = 830.76 × 479.04
  4. Step 4: Simplify right side
    555.16x = 397,967.27
  5. Step 5: Solve for x
    x = 397,967.27/555.16
  6. Step 6: Final answer
    x = 716.85

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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.