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Finding the Fourth Proportional to 1,751.76, 2,420.08 and 1,308.90

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Solution

The fourth proportional to 1,751.76, 2,420.08 and 1,308.90 is: 1,808.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,751.76 : 2,420.08 = 1,308.90 : x
  2. Step 2: Convert to fraction form
    1,751.76/2,420.08 = 1,308.90/x
  3. Step 3: Cross multiply
    1,751.76x = 2,420.08 × 1,308.90
  4. Step 4: Simplify right side
    1,751.76x = 3,167,642.71
  5. Step 5: Solve for x
    x = 3,167,642.71/1,751.76
  6. Step 6: Final answer
    x = 1,808.26

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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.