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Finding the Fourth Proportional to 646.27, 890.80 and 506.16

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Solution

The fourth proportional to 646.27, 890.80 and 506.16 is: 697.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.27 : 890.80 = 506.16 : x
  2. Step 2: Convert to fraction form
    646.27/890.80 = 506.16/x
  3. Step 3: Cross multiply
    646.27x = 890.80 × 506.16
  4. Step 4: Simplify right side
    646.27x = 450,887.33
  5. Step 5: Solve for x
    x = 450,887.33/646.27
  6. Step 6: Final answer
    x = 697.68

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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.