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Finding the Fourth Proportional to 526.78, 788.55 and 282.70

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Solution

The fourth proportional to 526.78, 788.55 and 282.70 is: 423.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.78 : 788.55 = 282.70 : x
  2. Step 2: Convert to fraction form
    526.78/788.55 = 282.70/x
  3. Step 3: Cross multiply
    526.78x = 788.55 × 282.70
  4. Step 4: Simplify right side
    526.78x = 222,923.09
  5. Step 5: Solve for x
    x = 222,923.09/526.78
  6. Step 6: Final answer
    x = 423.18

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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.