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Finding the Fourth Proportional to 280,320.60, 420,480.90 and 245,328.60

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Solution

The fourth proportional to 280,320.60, 420,480.90 and 245,328.60 is: 367,992.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,320.60 : 420,480.90 = 245,328.60 : x
  2. Step 2: Convert to fraction form
    280,320.60/420,480.90 = 245,328.60/x
  3. Step 3: Cross multiply
    280,320.60x = 420,480.90 × 245,328.60
  4. Step 4: Simplify right side
    280,320.60x = 103,155,990,523.74
  5. Step 5: Solve for x
    x = 103,155,990,523.74/280,320.60
  6. Step 6: Final answer
    x = 367,992.90

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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.