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Finding the Fourth Proportional to 565.71, 780.69 and 317.08

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Solution

The fourth proportional to 565.71, 780.69 and 317.08 is: 437.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    565.71 : 780.69 = 317.08 : x
  2. Step 2: Convert to fraction form
    565.71/780.69 = 317.08/x
  3. Step 3: Cross multiply
    565.71x = 780.69 × 317.08
  4. Step 4: Simplify right side
    565.71x = 247,541.19
  5. Step 5: Solve for x
    x = 247,541.19/565.71
  6. Step 6: Final answer
    x = 437.58

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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.