Home / 1,815.12-2,501.44-1,290.24

Finding the Fourth Proportional to 1,815.12, 2,501.44 and 1,290.24

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Solution

The fourth proportional to 1,815.12, 2,501.44 and 1,290.24 is: 1,778.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.12 : 2,501.44 = 1,290.24 : x
  2. Step 2: Convert to fraction form
    1,815.12/2,501.44 = 1,290.24/x
  3. Step 3: Cross multiply
    1,815.12x = 2,501.44 × 1,290.24
  4. Step 4: Simplify right side
    1,815.12x = 3,227,457.95
  5. Step 5: Solve for x
    x = 3,227,457.95/1,815.12
  6. Step 6: Final answer
    x = 1,778.10

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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.