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Finding the Fourth Proportional to 968.78, 1,453.10 and 556.63

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Solution

The fourth proportional to 968.78, 1,453.10 and 556.63 is: 834.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.78 : 1,453.10 = 556.63 : x
  2. Step 2: Convert to fraction form
    968.78/1,453.10 = 556.63/x
  3. Step 3: Cross multiply
    968.78x = 1,453.10 × 556.63
  4. Step 4: Simplify right side
    968.78x = 808,832.64
  5. Step 5: Solve for x
    x = 808,832.64/968.78
  6. Step 6: Final answer
    x = 834.90

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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.