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Finding the Fourth Proportional to 564.86, 779.60 and 328.76

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Solution

The fourth proportional to 564.86, 779.60 and 328.76 is: 453.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.86 : 779.60 = 328.76 : x
  2. Step 2: Convert to fraction form
    564.86/779.60 = 328.76/x
  3. Step 3: Cross multiply
    564.86x = 779.60 × 328.76
  4. Step 4: Simplify right side
    564.86x = 256,301.30
  5. Step 5: Solve for x
    x = 256,301.30/564.86
  6. Step 6: Final answer
    x = 453.74

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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.