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Finding the Fourth Proportional to 287.32, 432.79 and 283.54

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Solution

The fourth proportional to 287.32, 432.79 and 283.54 is: 427.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.32 : 432.79 = 283.54 : x
  2. Step 2: Convert to fraction form
    287.32/432.79 = 283.54/x
  3. Step 3: Cross multiply
    287.32x = 432.79 × 283.54
  4. Step 4: Simplify right side
    287.32x = 122,713.28
  5. Step 5: Solve for x
    x = 122,713.28/287.32
  6. Step 6: Final answer
    x = 427.10

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.