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Finding the Fourth Proportional to 651.78, 904.10 and 635.58

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Solution

The fourth proportional to 651.78, 904.10 and 635.58 is: 881.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.78 : 904.10 = 635.58 : x
  2. Step 2: Convert to fraction form
    651.78/904.10 = 635.58/x
  3. Step 3: Cross multiply
    651.78x = 904.10 × 635.58
  4. Step 4: Simplify right side
    651.78x = 574,624.70
  5. Step 5: Solve for x
    x = 574,624.70/651.78
  6. Step 6: Final answer
    x = 881.62

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.