Home / 811,400.70-1,217,101.05-220,424.70

Finding the Fourth Proportional to 811,400.70, 1,217,101.05 and 220,424.70

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Solution

The fourth proportional to 811,400.70, 1,217,101.05 and 220,424.70 is: 330,637.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,400.70 : 1,217,101.05 = 220,424.70 : x
  2. Step 2: Convert to fraction form
    811,400.70/1,217,101.05 = 220,424.70/x
  3. Step 3: Cross multiply
    811,400.70x = 1,217,101.05 × 220,424.70
  4. Step 4: Simplify right side
    811,400.70x = 268,279,133,815.94
  5. Step 5: Solve for x
    x = 268,279,133,815.94/811,400.70
  6. Step 6: Final answer
    x = 330,637.05

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Half scale
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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.