Home / 1,355.40-1,869.08-1,325.23

Finding the Fourth Proportional to 1,355.40, 1,869.08 and 1,325.23

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Solution

The fourth proportional to 1,355.40, 1,869.08 and 1,325.23 is: 1,827.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.40 : 1,869.08 = 1,325.23 : x
  2. Step 2: Convert to fraction form
    1,355.40/1,869.08 = 1,325.23/x
  3. Step 3: Cross multiply
    1,355.40x = 1,869.08 × 1,325.23
  4. Step 4: Simplify right side
    1,355.40x = 2,476,949.59
  5. Step 5: Solve for x
    x = 2,476,949.59/1,355.40
  6. Step 6: Final answer
    x = 1,827.47

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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.