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Finding the Fourth Proportional to 651.64, 898.98 and 418.72

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Solution

The fourth proportional to 651.64, 898.98 and 418.72 is: 577.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.64 : 898.98 = 418.72 : x
  2. Step 2: Convert to fraction form
    651.64/898.98 = 418.72/x
  3. Step 3: Cross multiply
    651.64x = 898.98 × 418.72
  4. Step 4: Simplify right side
    651.64x = 376,420.91
  5. Step 5: Solve for x
    x = 376,420.91/651.64
  6. Step 6: Final answer
    x = 577.65

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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.