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Finding the Fourth Proportional to 280,401.20, 420,601.80 and 93,412.70

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Solution

The fourth proportional to 280,401.20, 420,601.80 and 93,412.70 is: 140,119.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,401.20 : 420,601.80 = 93,412.70 : x
  2. Step 2: Convert to fraction form
    280,401.20/420,601.80 = 93,412.70/x
  3. Step 3: Cross multiply
    280,401.20x = 420,601.80 × 93,412.70
  4. Step 4: Simplify right side
    280,401.20x = 39,289,549,762.86
  5. Step 5: Solve for x
    x = 39,289,549,762.86/280,401.20
  6. Step 6: Final answer
    x = 140,119.05

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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.