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Finding the Fourth Proportional to 555.08, 761.91 and 491.52

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Solution

The fourth proportional to 555.08, 761.91 and 491.52 is: 674.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.08 : 761.91 = 491.52 : x
  2. Step 2: Convert to fraction form
    555.08/761.91 = 491.52/x
  3. Step 3: Cross multiply
    555.08x = 761.91 × 491.52
  4. Step 4: Simplify right side
    555.08x = 374,494.00
  5. Step 5: Solve for x
    x = 374,494.00/555.08
  6. Step 6: Final answer
    x = 674.67

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.