Home / 2,987.55-4,458.73-2,909.79

Finding the Fourth Proportional to 2,987.55, 4,458.73 and 2,909.79

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Solution

The fourth proportional to 2,987.55, 4,458.73 and 2,909.79 is: 4,342.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.55 : 4,458.73 = 2,909.79 : x
  2. Step 2: Convert to fraction form
    2,987.55/4,458.73 = 2,909.79/x
  3. Step 3: Cross multiply
    2,987.55x = 4,458.73 × 2,909.79
  4. Step 4: Simplify right side
    2,987.55x = 12,973,967.97
  5. Step 5: Solve for x
    x = 12,973,967.97/2,987.55
  6. Step 6: Final answer
    x = 4,342.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.