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Finding the Fourth Proportional to 1,328.79, 1,834.51 and 974.42

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Solution

The fourth proportional to 1,328.79, 1,834.51 and 974.42 is: 1,345.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.79 : 1,834.51 = 974.42 : x
  2. Step 2: Convert to fraction form
    1,328.79/1,834.51 = 974.42/x
  3. Step 3: Cross multiply
    1,328.79x = 1,834.51 × 974.42
  4. Step 4: Simplify right side
    1,328.79x = 1,787,583.23
  5. Step 5: Solve for x
    x = 1,787,583.23/1,328.79
  6. Step 6: Final answer
    x = 1,345.27

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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.