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Finding the Fourth Proportional to 555.69, 766.87 and 307.03

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Solution

The fourth proportional to 555.69, 766.87 and 307.03 is: 423.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.69 : 766.87 = 307.03 : x
  2. Step 2: Convert to fraction form
    555.69/766.87 = 307.03/x
  3. Step 3: Cross multiply
    555.69x = 766.87 × 307.03
  4. Step 4: Simplify right side
    555.69x = 235,450.56
  5. Step 5: Solve for x
    x = 235,450.56/555.69
  6. Step 6: Final answer
    x = 423.71

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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.