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Finding the Fourth Proportional to 520,392.15, 780,590.66 and 220,797.45

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Solution

The fourth proportional to 520,392.15, 780,590.66 and 220,797.45 is: 331,197.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,392.15 : 780,590.66 = 220,797.45 : x
  2. Step 2: Convert to fraction form
    520,392.15/780,590.66 = 220,797.45/x
  3. Step 3: Cross multiply
    520,392.15x = 780,590.66 × 220,797.45
  4. Step 4: Simplify right side
    520,392.15x = 172,352,426,117.83
  5. Step 5: Solve for x
    x = 172,352,426,117.83/520,392.15
  6. Step 6: Final answer
    x = 331,197.21

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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.