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Finding the Fourth Proportional to 520,218.20, 780,440.70 and 295,686.20

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Solution

The fourth proportional to 520,218.20, 780,440.70 and 295,686.20 is: 443,593.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,218.20 : 780,440.70 = 295,686.20 : x
  2. Step 2: Convert to fraction form
    520,218.20/780,440.70 = 295,686.20/x
  3. Step 3: Cross multiply
    520,218.20x = 780,440.70 × 295,686.20
  4. Step 4: Simplify right side
    520,218.20x = 230,765,544,908.34
  5. Step 5: Solve for x
    x = 230,765,544,908.34/520,218.20
  6. Step 6: Final answer
    x = 443,593.76

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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.