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Finding the Fourth Proportional to 1,368.24, 1,887.36 and 994.72

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Solution

The fourth proportional to 1,368.24, 1,887.36 and 994.72 is: 1,372.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.24 : 1,887.36 = 994.72 : x
  2. Step 2: Convert to fraction form
    1,368.24/1,887.36 = 994.72/x
  3. Step 3: Cross multiply
    1,368.24x = 1,887.36 × 994.72
  4. Step 4: Simplify right side
    1,368.24x = 1,877,394.74
  5. Step 5: Solve for x
    x = 1,877,394.74/1,368.24
  6. Step 6: Final answer
    x = 1,372.12

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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.