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Finding the Fourth Proportional to 580.66, 870.37 and 426.35

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Solution

The fourth proportional to 580.66, 870.37 and 426.35 is: 639.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.66 : 870.37 = 426.35 : x
  2. Step 2: Convert to fraction form
    580.66/870.37 = 426.35/x
  3. Step 3: Cross multiply
    580.66x = 870.37 × 426.35
  4. Step 4: Simplify right side
    580.66x = 371,082.25
  5. Step 5: Solve for x
    x = 371,082.25/580.66
  6. Step 6: Final answer
    x = 639.07

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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.