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Finding the Fourth Proportional to 520,084.80, 779,695.20 and 220,795.20

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Solution

The fourth proportional to 520,084.80, 779,695.20 and 220,795.20 is: 331,009.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,084.80 : 779,695.20 = 220,795.20 : x
  2. Step 2: Convert to fraction form
    520,084.80/779,695.20 = 220,795.20/x
  3. Step 3: Cross multiply
    520,084.80x = 779,695.20 × 220,795.20
  4. Step 4: Simplify right side
    520,084.80x = 172,152,957,623.04
  5. Step 5: Solve for x
    x = 172,152,957,623.04/520,084.80
  6. Step 6: Final answer
    x = 331,009.40

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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.