Home / 1,355.70-2,037.60-1,331.40

Finding the Fourth Proportional to 1,355.70, 2,037.60 and 1,331.40

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Solution

The fourth proportional to 1,355.70, 2,037.60 and 1,331.40 is: 2,001.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.70 : 2,037.60 = 1,331.40 : x
  2. Step 2: Convert to fraction form
    1,355.70/2,037.60 = 1,331.40/x
  3. Step 3: Cross multiply
    1,355.70x = 2,037.60 × 1,331.40
  4. Step 4: Simplify right side
    1,355.70x = 2,712,860.64
  5. Step 5: Solve for x
    x = 2,712,860.64/1,355.70
  6. Step 6: Final answer
    x = 2,001.08

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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.