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Finding the Fourth Proportional to 572.40, 793.80 and 545.40

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Solution

The fourth proportional to 572.40, 793.80 and 545.40 is: 756.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.40 : 793.80 = 545.40 : x
  2. Step 2: Convert to fraction form
    572.40/793.80 = 545.40/x
  3. Step 3: Cross multiply
    572.40x = 793.80 × 545.40
  4. Step 4: Simplify right side
    572.40x = 432,938.52
  5. Step 5: Solve for x
    x = 432,938.52/572.40
  6. Step 6: Final answer
    x = 756.36

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.