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Finding the Fourth Proportional to 3,189.51, 4,779.95 and 1,542.78

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Solution

The fourth proportional to 3,189.51, 4,779.95 and 1,542.78 is: 2,312.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,189.51 : 4,779.95 = 1,542.78 : x
  2. Step 2: Convert to fraction form
    3,189.51/4,779.95 = 1,542.78/x
  3. Step 3: Cross multiply
    3,189.51x = 4,779.95 × 1,542.78
  4. Step 4: Simplify right side
    3,189.51x = 7,374,403.55
  5. Step 5: Solve for x
    x = 7,374,403.55/3,189.51
  6. Step 6: Final answer
    x = 2,312.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.