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Finding the Fourth Proportional to 1,484.80, 2,040.80 and 1,309.12

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Solution

The fourth proportional to 1,484.80, 2,040.80 and 1,309.12 is: 1,799.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,484.80 : 2,040.80 = 1,309.12 : x
  2. Step 2: Convert to fraction form
    1,484.80/2,040.80 = 1,309.12/x
  3. Step 3: Cross multiply
    1,484.80x = 2,040.80 × 1,309.12
  4. Step 4: Simplify right side
    1,484.80x = 2,671,652.10
  5. Step 5: Solve for x
    x = 2,671,652.10/1,484.80
  6. Step 6: Final answer
    x = 1,799.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.