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Finding the Fourth Proportional to 520,049.80, 780,074.70 and 220,479.40

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Solution

The fourth proportional to 520,049.80, 780,074.70 and 220,479.40 is: 330,719.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,049.80 : 780,074.70 = 220,479.40 : x
  2. Step 2: Convert to fraction form
    520,049.80/780,074.70 = 220,479.40/x
  3. Step 3: Cross multiply
    520,049.80x = 780,074.70 × 220,479.40
  4. Step 4: Simplify right side
    520,049.80x = 171,990,401,811.18
  5. Step 5: Solve for x
    x = 171,990,401,811.18/520,049.80
  6. Step 6: Final answer
    x = 330,719.10

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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.