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Finding the Fourth Proportional to 580.50, 870.48 and 287.75

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Solution

The fourth proportional to 580.50, 870.48 and 287.75 is: 431.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.50 : 870.48 = 287.75 : x
  2. Step 2: Convert to fraction form
    580.50/870.48 = 287.75/x
  3. Step 3: Cross multiply
    580.50x = 870.48 × 287.75
  4. Step 4: Simplify right side
    580.50x = 250,482.80
  5. Step 5: Solve for x
    x = 250,482.80/580.50
  6. Step 6: Final answer
    x = 431.49

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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.