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Finding the Fourth Proportional to 646.02, 890.67 and 527.87

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Solution

The fourth proportional to 646.02, 890.67 and 527.87 is: 727.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.02 : 890.67 = 527.87 : x
  2. Step 2: Convert to fraction form
    646.02/890.67 = 527.87/x
  3. Step 3: Cross multiply
    646.02x = 890.67 × 527.87
  4. Step 4: Simplify right side
    646.02x = 470,162.18
  5. Step 5: Solve for x
    x = 470,162.18/646.02
  6. Step 6: Final answer
    x = 727.78

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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.