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Finding the Fourth Proportional to 1,616.40, 2,229.12 and 953.28

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Solution

The fourth proportional to 1,616.40, 2,229.12 and 953.28 is: 1,314.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,616.40 : 2,229.12 = 953.28 : x
  2. Step 2: Convert to fraction form
    1,616.40/2,229.12 = 953.28/x
  3. Step 3: Cross multiply
    1,616.40x = 2,229.12 × 953.28
  4. Step 4: Simplify right side
    1,616.40x = 2,124,975.51
  5. Step 5: Solve for x
    x = 2,124,975.51/1,616.40
  6. Step 6: Final answer
    x = 1,314.63

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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.