Home / 1,860.90-2,565.80-1,197.78

Finding the Fourth Proportional to 1,860.90, 2,565.80 and 1,197.78

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Solution

The fourth proportional to 1,860.90, 2,565.80 and 1,197.78 is: 1,651.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,860.90 : 2,565.80 = 1,197.78 : x
  2. Step 2: Convert to fraction form
    1,860.90/2,565.80 = 1,197.78/x
  3. Step 3: Cross multiply
    1,860.90x = 2,565.80 × 1,197.78
  4. Step 4: Simplify right side
    1,860.90x = 3,073,263.92
  5. Step 5: Solve for x
    x = 3,073,263.92/1,860.90
  6. Step 6: Final answer
    x = 1,651.49

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1.5x scale

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.