Home / 1,518.77-2,278.14-869.05

Finding the Fourth Proportional to 1,518.77, 2,278.14 and 869.05

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Solution

The fourth proportional to 1,518.77, 2,278.14 and 869.05 is: 1,303.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,518.77 : 2,278.14 = 869.05 : x
  2. Step 2: Convert to fraction form
    1,518.77/2,278.14 = 869.05/x
  3. Step 3: Cross multiply
    1,518.77x = 2,278.14 × 869.05
  4. Step 4: Simplify right side
    1,518.77x = 1,979,817.57
  5. Step 5: Solve for x
    x = 1,979,817.57/1,518.77
  6. Step 6: Final answer
    x = 1,303.57

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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.