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Finding the Fourth Proportional to 913.36, 1,372.47 and 910.93

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Solution

The fourth proportional to 913.36, 1,372.47 and 910.93 is: 1,368.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.36 : 1,372.47 = 910.93 : x
  2. Step 2: Convert to fraction form
    913.36/1,372.47 = 910.93/x
  3. Step 3: Cross multiply
    913.36x = 1,372.47 × 910.93
  4. Step 4: Simplify right side
    913.36x = 1,250,224.10
  5. Step 5: Solve for x
    x = 1,250,224.10/913.36
  6. Step 6: Final answer
    x = 1,368.82

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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.