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Finding the Fourth Proportional to 968.49, 1,453.55 and 391.77

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Solution

The fourth proportional to 968.49, 1,453.55 and 391.77 is: 587.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.49 : 1,453.55 = 391.77 : x
  2. Step 2: Convert to fraction form
    968.49/1,453.55 = 391.77/x
  3. Step 3: Cross multiply
    968.49x = 1,453.55 × 391.77
  4. Step 4: Simplify right side
    968.49x = 569,455.32
  5. Step 5: Solve for x
    x = 569,455.32/968.49
  6. Step 6: Final answer
    x = 587.98

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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.