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Finding the Fourth Proportional to 649.08, 894.78 and 624.51

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Solution

The fourth proportional to 649.08, 894.78 and 624.51 is: 860.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.08 : 894.78 = 624.51 : x
  2. Step 2: Convert to fraction form
    649.08/894.78 = 624.51/x
  3. Step 3: Cross multiply
    649.08x = 894.78 × 624.51
  4. Step 4: Simplify right side
    649.08x = 558,799.06
  5. Step 5: Solve for x
    x = 558,799.06/649.08
  6. Step 6: Final answer
    x = 860.91

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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.