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Finding the Fourth Proportional to 580.68, 870 and 397.68

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Solution

The fourth proportional to 580.68, 870 and 397.68 is: 595.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.68 : 870 = 397.68 : x
  2. Step 2: Convert to fraction form
    580.68/870 = 397.68/x
  3. Step 3: Cross multiply
    580.68x = 870 × 397.68
  4. Step 4: Simplify right side
    580.68x = 345,981.60
  5. Step 5: Solve for x
    x = 345,981.60/580.68
  6. Step 6: Final answer
    x = 595.82

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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.