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Finding the Fourth Proportional to 565.32, 780.10 and 316.59

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Solution

The fourth proportional to 565.32, 780.10 and 316.59 is: 436.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    565.32 : 780.10 = 316.59 : x
  2. Step 2: Convert to fraction form
    565.32/780.10 = 316.59/x
  3. Step 3: Cross multiply
    565.32x = 780.10 × 316.59
  4. Step 4: Simplify right side
    565.32x = 246,973.81
  5. Step 5: Solve for x
    x = 246,973.81/565.32
  6. Step 6: Final answer
    x = 436.88

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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.