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Finding the Fourth Proportional to 560.01, 772.76 and 311.31

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Solution

The fourth proportional to 560.01, 772.76 and 311.31 is: 429.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.01 : 772.76 = 311.31 : x
  2. Step 2: Convert to fraction form
    560.01/772.76 = 311.31/x
  3. Step 3: Cross multiply
    560.01x = 772.76 × 311.31
  4. Step 4: Simplify right side
    560.01x = 240,568.41
  5. Step 5: Solve for x
    x = 240,568.41/560.01
  6. Step 6: Final answer
    x = 429.58

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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.