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Finding the Fourth Proportional to 580.49, 870.12 and 190.39

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Solution

The fourth proportional to 580.49, 870.12 and 190.39 is: 285.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.49 : 870.12 = 190.39 : x
  2. Step 2: Convert to fraction form
    580.49/870.12 = 190.39/x
  3. Step 3: Cross multiply
    580.49x = 870.12 × 190.39
  4. Step 4: Simplify right side
    580.49x = 165,657.32
  5. Step 5: Solve for x
    x = 165,657.32/580.49
  6. Step 6: Final answer
    x = 285.38

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Double scale
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1.5x scale

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.