Home / 280,583.10-420,874.65-140,291.10

Finding the Fourth Proportional to 280,583.10, 420,874.65 and 140,291.10

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Solution

The fourth proportional to 280,583.10, 420,874.65 and 140,291.10 is: 210,436.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,583.10 : 420,874.65 = 140,291.10 : x
  2. Step 2: Convert to fraction form
    280,583.10/420,874.65 = 140,291.10/x
  3. Step 3: Cross multiply
    280,583.10x = 420,874.65 × 140,291.10
  4. Step 4: Simplify right side
    280,583.10x = 59,044,967,610.62
  5. Step 5: Solve for x
    x = 59,044,967,610.62/280,583.10
  6. Step 6: Final answer
    x = 210,436.65

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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.