Home / 2,187,178.80-3,280,768.20-989,140.20

Finding the Fourth Proportional to 2,187,178.80, 3,280,768.20 and 989,140.20

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Solution

The fourth proportional to 2,187,178.80, 3,280,768.20 and 989,140.20 is: 1,483,710.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187,178.80 : 3,280,768.20 = 989,140.20 : x
  2. Step 2: Convert to fraction form
    2,187,178.80/3,280,768.20 = 989,140.20/x
  3. Step 3: Cross multiply
    2,187,178.80x = 3,280,768.20 × 989,140.20
  4. Step 4: Simplify right side
    2,187,178.80x = 3,245,139,713,501.64
  5. Step 5: Solve for x
    x = 3,245,139,713,501.64/2,187,178.80
  6. Step 6: Final answer
    x = 1,483,710.30

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Double scale
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Similar ratio
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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.