Home / 280,379.19-420,635.08-90,839.25

Finding the Fourth Proportional to 280,379.19, 420,635.08 and 90,839.25

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Solution

The fourth proportional to 280,379.19, 420,635.08 and 90,839.25 is: 136,280.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,379.19 : 420,635.08 = 90,839.25 : x
  2. Step 2: Convert to fraction form
    280,379.19/420,635.08 = 90,839.25/x
  3. Step 3: Cross multiply
    280,379.19x = 420,635.08 × 90,839.25
  4. Step 4: Simplify right side
    280,379.19x = 38,210,173,610.43
  5. Step 5: Solve for x
    x = 38,210,173,610.43/280,379.19
  6. Step 6: Final answer
    x = 136,280.35

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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.