Home / 1,818.40-2,511.12-1,487.20

Finding the Fourth Proportional to 1,818.40, 2,511.12 and 1,487.20

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Solution

The fourth proportional to 1,818.40, 2,511.12 and 1,487.20 is: 2,053.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,818.40 : 2,511.12 = 1,487.20 : x
  2. Step 2: Convert to fraction form
    1,818.40/2,511.12 = 1,487.20/x
  3. Step 3: Cross multiply
    1,818.40x = 2,511.12 × 1,487.20
  4. Step 4: Simplify right side
    1,818.40x = 3,734,537.66
  5. Step 5: Solve for x
    x = 3,734,537.66/1,818.40
  6. Step 6: Final answer
    x = 2,053.75

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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.