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Finding the Fourth Proportional to 487.69, 673.04 and 277.90

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Solution

The fourth proportional to 487.69, 673.04 and 277.90 is: 383.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.69 : 673.04 = 277.90 : x
  2. Step 2: Convert to fraction form
    487.69/673.04 = 277.90/x
  3. Step 3: Cross multiply
    487.69x = 673.04 × 277.90
  4. Step 4: Simplify right side
    487.69x = 187,036.83
  5. Step 5: Solve for x
    x = 187,036.83/487.69
  6. Step 6: Final answer
    x = 383.52

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Double scale
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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.