Home / 1,561.86-2,153.08-1,118.98

Finding the Fourth Proportional to 1,561.86, 2,153.08 and 1,118.98

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Solution

The fourth proportional to 1,561.86, 2,153.08 and 1,118.98 is: 1,542.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.86 : 2,153.08 = 1,118.98 : x
  2. Step 2: Convert to fraction form
    1,561.86/2,153.08 = 1,118.98/x
  3. Step 3: Cross multiply
    1,561.86x = 2,153.08 × 1,118.98
  4. Step 4: Simplify right side
    1,561.86x = 2,409,253.46
  5. Step 5: Solve for x
    x = 2,409,253.46/1,561.86
  6. Step 6: Final answer
    x = 1,542.55

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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.