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Finding the Fourth Proportional to 856.14, 1,283.38 and 527.28

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Solution

The fourth proportional to 856.14, 1,283.38 and 527.28 is: 790.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    856.14 : 1,283.38 = 527.28 : x
  2. Step 2: Convert to fraction form
    856.14/1,283.38 = 527.28/x
  3. Step 3: Cross multiply
    856.14x = 1,283.38 × 527.28
  4. Step 4: Simplify right side
    856.14x = 676,700.61
  5. Step 5: Solve for x
    x = 676,700.61/856.14
  6. Step 6: Final answer
    x = 790.41

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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.