Home / 1,645.02-2,270.39-981.75

Finding the Fourth Proportional to 1,645.02, 2,270.39 and 981.75

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Solution

The fourth proportional to 1,645.02, 2,270.39 and 981.75 is: 1,354.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.02 : 2,270.39 = 981.75 : x
  2. Step 2: Convert to fraction form
    1,645.02/2,270.39 = 981.75/x
  3. Step 3: Cross multiply
    1,645.02x = 2,270.39 × 981.75
  4. Step 4: Simplify right side
    1,645.02x = 2,228,939.12
  5. Step 5: Solve for x
    x = 2,228,939.12/1,645.02
  6. Step 6: Final answer
    x = 1,354.96

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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.