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Finding the Fourth Proportional to 519,213.70, 778,820.55 and 294,487.30

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Solution

The fourth proportional to 519,213.70, 778,820.55 and 294,487.30 is: 441,730.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,213.70 : 778,820.55 = 294,487.30 : x
  2. Step 2: Convert to fraction form
    519,213.70/778,820.55 = 294,487.30/x
  3. Step 3: Cross multiply
    519,213.70x = 778,820.55 × 294,487.30
  4. Step 4: Simplify right side
    519,213.70x = 229,352,760,954.02
  5. Step 5: Solve for x
    x = 229,352,760,954.02/519,213.70
  6. Step 6: Final answer
    x = 441,730.95

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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.