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Finding the Fourth Proportional to 520.83, 776.45 and 479.72

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Solution

The fourth proportional to 520.83, 776.45 and 479.72 is: 715.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.83 : 776.45 = 479.72 : x
  2. Step 2: Convert to fraction form
    520.83/776.45 = 479.72/x
  3. Step 3: Cross multiply
    520.83x = 776.45 × 479.72
  4. Step 4: Simplify right side
    520.83x = 372,472.31
  5. Step 5: Solve for x
    x = 372,472.31/520.83
  6. Step 6: Final answer
    x = 715.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.