Home / 280,583.19-420,874.79-70,221.13

Finding the Fourth Proportional to 280,583.19, 420,874.79 and 70,221.13

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Solution

The fourth proportional to 280,583.19, 420,874.79 and 70,221.13 is: 105,331.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,583.19 : 420,874.79 = 70,221.13 : x
  2. Step 2: Convert to fraction form
    280,583.19/420,874.79 = 70,221.13/x
  3. Step 3: Cross multiply
    280,583.19x = 420,874.79 × 70,221.13
  4. Step 4: Simplify right side
    280,583.19x = 29,554,301,939.02
  5. Step 5: Solve for x
    x = 29,554,301,939.02/280,583.19
  6. Step 6: Final answer
    x = 105,331.69

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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.