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Finding the Fourth Proportional to 580.07, 870.30 and 255.46

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Solution

The fourth proportional to 580.07, 870.30 and 255.46 is: 383.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.07 : 870.30 = 255.46 : x
  2. Step 2: Convert to fraction form
    580.07/870.30 = 255.46/x
  3. Step 3: Cross multiply
    580.07x = 870.30 × 255.46
  4. Step 4: Simplify right side
    580.07x = 222,326.84
  5. Step 5: Solve for x
    x = 222,326.84/580.07
  6. Step 6: Final answer
    x = 383.28

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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.