Home / 2,225.40-3,070.65-1,280.85

Finding the Fourth Proportional to 2,225.40, 3,070.65 and 1,280.85

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Solution

The fourth proportional to 2,225.40, 3,070.65 and 1,280.85 is: 1,767.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,225.40 : 3,070.65 = 1,280.85 : x
  2. Step 2: Convert to fraction form
    2,225.40/3,070.65 = 1,280.85/x
  3. Step 3: Cross multiply
    2,225.40x = 3,070.65 × 1,280.85
  4. Step 4: Simplify right side
    2,225.40x = 3,933,042.05
  5. Step 5: Solve for x
    x = 3,933,042.05/2,225.40
  6. Step 6: Final answer
    x = 1,767.34

Related Problems

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Half scale
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Double scale
Find fourth proportional to 2,226.40, 3,072.03 and 1,281.85
Similar ratio
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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.