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Finding the Fourth Proportional to 564.40, 848.22 and 542.80

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Solution

The fourth proportional to 564.40, 848.22 and 542.80 is: 815.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.40 : 848.22 = 542.80 : x
  2. Step 2: Convert to fraction form
    564.40/848.22 = 542.80/x
  3. Step 3: Cross multiply
    564.40x = 848.22 × 542.80
  4. Step 4: Simplify right side
    564.40x = 460,413.82
  5. Step 5: Solve for x
    x = 460,413.82/564.40
  6. Step 6: Final answer
    x = 815.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.