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Finding the Fourth Proportional to 651.60, 898.74 and 418.68

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Solution

The fourth proportional to 651.60, 898.74 and 418.68 is: 577.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.60 : 898.74 = 418.68 : x
  2. Step 2: Convert to fraction form
    651.60/898.74 = 418.68/x
  3. Step 3: Cross multiply
    651.60x = 898.74 × 418.68
  4. Step 4: Simplify right side
    651.60x = 376,284.46
  5. Step 5: Solve for x
    x = 376,284.46/651.60
  6. Step 6: Final answer
    x = 577.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.