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Finding the Fourth Proportional to 280,400.70, 420,601.05 and 93,412.20

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Solution

The fourth proportional to 280,400.70, 420,601.05 and 93,412.20 is: 140,118.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,400.70 : 420,601.05 = 93,412.20 : x
  2. Step 2: Convert to fraction form
    280,400.70/420,601.05 = 93,412.20/x
  3. Step 3: Cross multiply
    280,400.70x = 420,601.05 × 93,412.20
  4. Step 4: Simplify right side
    280,400.70x = 39,289,269,402.81
  5. Step 5: Solve for x
    x = 39,289,269,402.81/280,400.70
  6. Step 6: Final answer
    x = 140,118.30

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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.