Home / 1,178.12-1,619.18-1,145.32

Finding the Fourth Proportional to 1,178.12, 1,619.18 and 1,145.32

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Solution

The fourth proportional to 1,178.12, 1,619.18 and 1,145.32 is: 1,574.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.12 : 1,619.18 = 1,145.32 : x
  2. Step 2: Convert to fraction form
    1,178.12/1,619.18 = 1,145.32/x
  3. Step 3: Cross multiply
    1,178.12x = 1,619.18 × 1,145.32
  4. Step 4: Simplify right side
    1,178.12x = 1,854,479.24
  5. Step 5: Solve for x
    x = 1,854,479.24/1,178.12
  6. Step 6: Final answer
    x = 1,574.10

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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.