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Finding the Fourth Proportional to 649.60, 895.40 and 498.54

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Solution

The fourth proportional to 649.60, 895.40 and 498.54 is: 687.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.60 : 895.40 = 498.54 : x
  2. Step 2: Convert to fraction form
    649.60/895.40 = 498.54/x
  3. Step 3: Cross multiply
    649.60x = 895.40 × 498.54
  4. Step 4: Simplify right side
    649.60x = 446,392.72
  5. Step 5: Solve for x
    x = 446,392.72/649.60
  6. Step 6: Final answer
    x = 687.18

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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.