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Finding the Fourth Proportional to 514.20, 709.38 and 339.32

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Solution

The fourth proportional to 514.20, 709.38 and 339.32 is: 468.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.20 : 709.38 = 339.32 : x
  2. Step 2: Convert to fraction form
    514.20/709.38 = 339.32/x
  3. Step 3: Cross multiply
    514.20x = 709.38 × 339.32
  4. Step 4: Simplify right side
    514.20x = 240,706.82
  5. Step 5: Solve for x
    x = 240,706.82/514.20
  6. Step 6: Final answer
    x = 468.12

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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.