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Finding the Fourth Proportional to 520,213.20, 779,801.40 and 239,240.40

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Solution

The fourth proportional to 520,213.20, 779,801.40 and 239,240.40 is: 358,622.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,213.20 : 779,801.40 = 239,240.40 : x
  2. Step 2: Convert to fraction form
    520,213.20/779,801.40 = 239,240.40/x
  3. Step 3: Cross multiply
    520,213.20x = 779,801.40 × 239,240.40
  4. Step 4: Simplify right side
    520,213.20x = 186,559,998,856.56
  5. Step 5: Solve for x
    x = 186,559,998,856.56/520,213.20
  6. Step 6: Final answer
    x = 358,622.19

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Half scale
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Double scale
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Similar ratio
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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.