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Finding the Fourth Proportional to 561.83, 775.38 and 328.95

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Solution

The fourth proportional to 561.83, 775.38 and 328.95 is: 453.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.83 : 775.38 = 328.95 : x
  2. Step 2: Convert to fraction form
    561.83/775.38 = 328.95/x
  3. Step 3: Cross multiply
    561.83x = 775.38 × 328.95
  4. Step 4: Simplify right side
    561.83x = 255,061.25
  5. Step 5: Solve for x
    x = 255,061.25/561.83
  6. Step 6: Final answer
    x = 453.99

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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.