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Finding the Fourth Proportional to 560.79, 774.09 and 339.66

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Solution

The fourth proportional to 560.79, 774.09 and 339.66 is: 468.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.79 : 774.09 = 339.66 : x
  2. Step 2: Convert to fraction form
    560.79/774.09 = 339.66/x
  3. Step 3: Cross multiply
    560.79x = 774.09 × 339.66
  4. Step 4: Simplify right side
    560.79x = 262,927.41
  5. Step 5: Solve for x
    x = 262,927.41/560.79
  6. Step 6: Final answer
    x = 468.85

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1.5x scale

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.