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Finding the Fourth Proportional to 580.86, 870.57 and 409.50

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Solution

The fourth proportional to 580.86, 870.57 and 409.50 is: 613.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.86 : 870.57 = 409.50 : x
  2. Step 2: Convert to fraction form
    580.86/870.57 = 409.50/x
  3. Step 3: Cross multiply
    580.86x = 870.57 × 409.50
  4. Step 4: Simplify right side
    580.86x = 356,498.42
  5. Step 5: Solve for x
    x = 356,498.42/580.86
  6. Step 6: Final answer
    x = 613.74

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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.