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Finding the Fourth Proportional to 519,241.10, 778,861.65 and 487,748.30

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Solution

The fourth proportional to 519,241.10, 778,861.65 and 487,748.30 is: 731,622.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,241.10 : 778,861.65 = 487,748.30 : x
  2. Step 2: Convert to fraction form
    519,241.10/778,861.65 = 487,748.30/x
  3. Step 3: Cross multiply
    519,241.10x = 778,861.65 × 487,748.30
  4. Step 4: Simplify right side
    519,241.10x = 379,888,445,722.70
  5. Step 5: Solve for x
    x = 379,888,445,722.70/519,241.10
  6. Step 6: Final answer
    x = 731,622.45

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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.