Home / 1,926.40-2,658.88-1,140.80

Finding the Fourth Proportional to 1,926.40, 2,658.88 and 1,140.80

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Solution

The fourth proportional to 1,926.40, 2,658.88 and 1,140.80 is: 1,574.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,926.40 : 2,658.88 = 1,140.80 : x
  2. Step 2: Convert to fraction form
    1,926.40/2,658.88 = 1,140.80/x
  3. Step 3: Cross multiply
    1,926.40x = 2,658.88 × 1,140.80
  4. Step 4: Simplify right side
    1,926.40x = 3,033,250.30
  5. Step 5: Solve for x
    x = 3,033,250.30/1,926.40
  6. Step 6: Final answer
    x = 1,574.57

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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.