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Finding the Fourth Proportional to 682.72, 943.20 and 507.76

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Solution

The fourth proportional to 682.72, 943.20 and 507.76 is: 701.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.72 : 943.20 = 507.76 : x
  2. Step 2: Convert to fraction form
    682.72/943.20 = 507.76/x
  3. Step 3: Cross multiply
    682.72x = 943.20 × 507.76
  4. Step 4: Simplify right side
    682.72x = 478,919.23
  5. Step 5: Solve for x
    x = 478,919.23/682.72
  6. Step 6: Final answer
    x = 701.49

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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.