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Finding the Fourth Proportional to 560.95, 774.14 and 395.21

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Solution

The fourth proportional to 560.95, 774.14 and 395.21 is: 545.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.95 : 774.14 = 395.21 : x
  2. Step 2: Convert to fraction form
    560.95/774.14 = 395.21/x
  3. Step 3: Cross multiply
    560.95x = 774.14 × 395.21
  4. Step 4: Simplify right side
    560.95x = 305,947.83
  5. Step 5: Solve for x
    x = 305,947.83/560.95
  6. Step 6: Final answer
    x = 545.41

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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.