Home / 1,561.32-2,151.66-1,118.45

Finding the Fourth Proportional to 1,561.32, 2,151.66 and 1,118.45

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Solution

The fourth proportional to 1,561.32, 2,151.66 and 1,118.45 is: 1,541.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.32 : 2,151.66 = 1,118.45 : x
  2. Step 2: Convert to fraction form
    1,561.32/2,151.66 = 1,118.45/x
  3. Step 3: Cross multiply
    1,561.32x = 2,151.66 × 1,118.45
  4. Step 4: Simplify right side
    1,561.32x = 2,406,524.13
  5. Step 5: Solve for x
    x = 2,406,524.13/1,561.32
  6. Step 6: Final answer
    x = 1,541.34

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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.