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Finding the Fourth Proportional to 648.69, 894.69 and 500.87

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Solution

The fourth proportional to 648.69, 894.69 and 500.87 is: 690.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.69 : 894.69 = 500.87 : x
  2. Step 2: Convert to fraction form
    648.69/894.69 = 500.87/x
  3. Step 3: Cross multiply
    648.69x = 894.69 × 500.87
  4. Step 4: Simplify right side
    648.69x = 448,118.91
  5. Step 5: Solve for x
    x = 448,118.91/648.69
  6. Step 6: Final answer
    x = 690.81

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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.