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Finding the Fourth Proportional to 512.19, 706.83 and 279.32

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Solution

The fourth proportional to 512.19, 706.83 and 279.32 is: 385.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.19 : 706.83 = 279.32 : x
  2. Step 2: Convert to fraction form
    512.19/706.83 = 279.32/x
  3. Step 3: Cross multiply
    512.19x = 706.83 × 279.32
  4. Step 4: Simplify right side
    512.19x = 197,426.82
  5. Step 5: Solve for x
    x = 197,426.82/512.19
  6. Step 6: Final answer
    x = 385.46

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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.