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Finding the Fourth Proportional to 2,642.88, 3,643.20 and 1,756.80

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Solution

The fourth proportional to 2,642.88, 3,643.20 and 1,756.80 is: 2,421.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,642.88 : 3,643.20 = 1,756.80 : x
  2. Step 2: Convert to fraction form
    2,642.88/3,643.20 = 1,756.80/x
  3. Step 3: Cross multiply
    2,642.88x = 3,643.20 × 1,756.80
  4. Step 4: Simplify right side
    2,642.88x = 6,400,373.76
  5. Step 5: Solve for x
    x = 6,400,373.76/2,642.88
  6. Step 6: Final answer
    x = 2,421.74

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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.