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Finding the Fourth Proportional to 857.76, 1,283.40 and 532.32

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Solution

The fourth proportional to 857.76, 1,283.40 and 532.32 is: 796.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.76 : 1,283.40 = 532.32 : x
  2. Step 2: Convert to fraction form
    857.76/1,283.40 = 532.32/x
  3. Step 3: Cross multiply
    857.76x = 1,283.40 × 532.32
  4. Step 4: Simplify right side
    857.76x = 683,179.49
  5. Step 5: Solve for x
    x = 683,179.49/857.76
  6. Step 6: Final answer
    x = 796.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.