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Finding the Fourth Proportional to 520,319.73, 780,467.40 and 239,836.98

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Solution

The fourth proportional to 520,319.73, 780,467.40 and 239,836.98 is: 359,749.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,319.73 : 780,467.40 = 239,836.98 : x
  2. Step 2: Convert to fraction form
    520,319.73/780,467.40 = 239,836.98/x
  3. Step 3: Cross multiply
    520,319.73x = 780,467.40 × 239,836.98
  4. Step 4: Simplify right side
    520,319.73x = 187,184,944,204.45
  5. Step 5: Solve for x
    x = 187,184,944,204.45/520,319.73
  6. Step 6: Final answer
    x = 359,749.85

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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.