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Finding the Fourth Proportional to 579.80, 870.06 and 539.84

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Solution

The fourth proportional to 579.80, 870.06 and 539.84 is: 810.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.80 : 870.06 = 539.84 : x
  2. Step 2: Convert to fraction form
    579.80/870.06 = 539.84/x
  3. Step 3: Cross multiply
    579.80x = 870.06 × 539.84
  4. Step 4: Simplify right side
    579.80x = 469,693.19
  5. Step 5: Solve for x
    x = 469,693.19/579.80
  6. Step 6: Final answer
    x = 810.10

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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.