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Finding the Fourth Proportional to 801.30, 1,200.39 and 526.55

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Solution

The fourth proportional to 801.30, 1,200.39 and 526.55 is: 788.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.30 : 1,200.39 = 526.55 : x
  2. Step 2: Convert to fraction form
    801.30/1,200.39 = 526.55/x
  3. Step 3: Cross multiply
    801.30x = 1,200.39 × 526.55
  4. Step 4: Simplify right side
    801.30x = 632,066.38
  5. Step 5: Solve for x
    x = 632,066.38/801.30
  6. Step 6: Final answer
    x = 788.80

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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.