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Finding the Fourth Proportional to 853.95, 1,178.77 and 735.49

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Solution

The fourth proportional to 853.95, 1,178.77 and 735.49 is: 1,015.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.95 : 1,178.77 = 735.49 : x
  2. Step 2: Convert to fraction form
    853.95/1,178.77 = 735.49/x
  3. Step 3: Cross multiply
    853.95x = 1,178.77 × 735.49
  4. Step 4: Simplify right side
    853.95x = 866,973.55
  5. Step 5: Solve for x
    x = 866,973.55/853.95
  6. Step 6: Final answer
    x = 1,015.25

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1.5x scale

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.