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Finding the Fourth Proportional to 520,782.30, 718,756.20 and 329,813.46

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Solution

The fourth proportional to 520,782.30, 718,756.20 and 329,813.46 is: 455,191.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,782.30 : 718,756.20 = 329,813.46 : x
  2. Step 2: Convert to fraction form
    520,782.30/718,756.20 = 329,813.46/x
  3. Step 3: Cross multiply
    520,782.30x = 718,756.20 × 329,813.46
  4. Step 4: Simplify right side
    520,782.30x = 237,055,469,218.45
  5. Step 5: Solve for x
    x = 237,055,469,218.45/520,782.30
  6. Step 6: Final answer
    x = 455,191.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.