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Finding the Fourth Proportional to 580.47, 800.76 and 383.64

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Solution

The fourth proportional to 580.47, 800.76 and 383.64 is: 529.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.47 : 800.76 = 383.64 : x
  2. Step 2: Convert to fraction form
    580.47/800.76 = 383.64/x
  3. Step 3: Cross multiply
    580.47x = 800.76 × 383.64
  4. Step 4: Simplify right side
    580.47x = 307,203.57
  5. Step 5: Solve for x
    x = 307,203.57/580.47
  6. Step 6: Final answer
    x = 529.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.