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Finding the Fourth Proportional to 520,338.20, 717,856.23 and 345,991.92

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Solution

The fourth proportional to 520,338.20, 717,856.23 and 345,991.92 is: 477,328.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,338.20 : 717,856.23 = 345,991.92 : x
  2. Step 2: Convert to fraction form
    520,338.20/717,856.23 = 345,991.92/x
  3. Step 3: Cross multiply
    520,338.20x = 717,856.23 × 345,991.92
  4. Step 4: Simplify right side
    520,338.20x = 248,372,455,698.80
  5. Step 5: Solve for x
    x = 248,372,455,698.80/520,338.20
  6. Step 6: Final answer
    x = 477,328.89

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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.