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Finding the Fourth Proportional to 526.44, 788.70 and 489

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Solution

The fourth proportional to 526.44, 788.70 and 489 is: 732.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.44 : 788.70 = 489 : x
  2. Step 2: Convert to fraction form
    526.44/788.70 = 489/x
  3. Step 3: Cross multiply
    526.44x = 788.70 × 489
  4. Step 4: Simplify right side
    526.44x = 385,674.30
  5. Step 5: Solve for x
    x = 385,674.30/526.44
  6. Step 6: Final answer
    x = 732.61

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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.