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Finding the Fourth Proportional to 520,448.85, 780,894.72 and 220,993.89

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Solution

The fourth proportional to 520,448.85, 780,894.72 and 220,993.89 is: 331,584.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,448.85 : 780,894.72 = 220,993.89 : x
  2. Step 2: Convert to fraction form
    520,448.85/780,894.72 = 220,993.89/x
  3. Step 3: Cross multiply
    520,448.85x = 780,894.72 × 220,993.89
  4. Step 4: Simplify right side
    520,448.85x = 172,572,961,853.26
  5. Step 5: Solve for x
    x = 172,572,961,853.26/520,448.85
  6. Step 6: Final answer
    x = 331,584.87

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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.