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Finding the Fourth Proportional to 670.20, 923.70 and 545.59

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Solution

The fourth proportional to 670.20, 923.70 and 545.59 is: 751.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.20 : 923.70 = 545.59 : x
  2. Step 2: Convert to fraction form
    670.20/923.70 = 545.59/x
  3. Step 3: Cross multiply
    670.20x = 923.70 × 545.59
  4. Step 4: Simplify right side
    670.20x = 503,961.48
  5. Step 5: Solve for x
    x = 503,961.48/670.20
  6. Step 6: Final answer
    x = 751.96

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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.