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Finding the Fourth Proportional to 767.84, 1,151.76 and 402.56

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Solution

The fourth proportional to 767.84, 1,151.76 and 402.56 is: 603.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.84 : 1,151.76 = 402.56 : x
  2. Step 2: Convert to fraction form
    767.84/1,151.76 = 402.56/x
  3. Step 3: Cross multiply
    767.84x = 1,151.76 × 402.56
  4. Step 4: Simplify right side
    767.84x = 463,652.51
  5. Step 5: Solve for x
    x = 463,652.51/767.84
  6. Step 6: Final answer
    x = 603.84

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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.