Home / 1,419.36-2,123.16-1,291.20

Finding the Fourth Proportional to 1,419.36, 2,123.16 and 1,291.20

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Solution

The fourth proportional to 1,419.36, 2,123.16 and 1,291.20 is: 1,931.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.36 : 2,123.16 = 1,291.20 : x
  2. Step 2: Convert to fraction form
    1,419.36/2,123.16 = 1,291.20/x
  3. Step 3: Cross multiply
    1,419.36x = 2,123.16 × 1,291.20
  4. Step 4: Simplify right side
    1,419.36x = 2,741,424.19
  5. Step 5: Solve for x
    x = 2,741,424.19/1,419.36
  6. Step 6: Final answer
    x = 1,931.45

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1.5x scale

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.