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Finding the Fourth Proportional to 1,551.72, 2,141.75 and 954.36

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Solution

The fourth proportional to 1,551.72, 2,141.75 and 954.36 is: 1,317.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.72 : 2,141.75 = 954.36 : x
  2. Step 2: Convert to fraction form
    1,551.72/2,141.75 = 954.36/x
  3. Step 3: Cross multiply
    1,551.72x = 2,141.75 × 954.36
  4. Step 4: Simplify right side
    1,551.72x = 2,044,000.53
  5. Step 5: Solve for x
    x = 2,044,000.53/1,551.72
  6. Step 6: Final answer
    x = 1,317.25

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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.