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Finding the Fourth Proportional to 520,022.90, 778,722.15 and 415,046.90

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Solution

The fourth proportional to 520,022.90, 778,722.15 and 415,046.90 is: 621,523.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,022.90 : 778,722.15 = 415,046.90 : x
  2. Step 2: Convert to fraction form
    520,022.90/778,722.15 = 415,046.90/x
  3. Step 3: Cross multiply
    520,022.90x = 778,722.15 × 415,046.90
  4. Step 4: Simplify right side
    520,022.90x = 323,206,214,318.84
  5. Step 5: Solve for x
    x = 323,206,214,318.84/520,022.90
  6. Step 6: Final answer
    x = 621,523.04

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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.