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Finding the Fourth Proportional to 1,103.51, 1,652.76 and 913.70

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Solution

The fourth proportional to 1,103.51, 1,652.76 and 913.70 is: 1,368.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,103.51 : 1,652.76 = 913.70 : x
  2. Step 2: Convert to fraction form
    1,103.51/1,652.76 = 913.70/x
  3. Step 3: Cross multiply
    1,103.51x = 1,652.76 × 913.70
  4. Step 4: Simplify right side
    1,103.51x = 1,510,126.81
  5. Step 5: Solve for x
    x = 1,510,126.81/1,103.51
  6. Step 6: Final answer
    x = 1,368.48

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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.