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Finding the Fourth Proportional to 515,741.80, 773,612.70 and 347,780.20

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Solution

The fourth proportional to 515,741.80, 773,612.70 and 347,780.20 is: 521,670.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,741.80 : 773,612.70 = 347,780.20 : x
  2. Step 2: Convert to fraction form
    515,741.80/773,612.70 = 347,780.20/x
  3. Step 3: Cross multiply
    515,741.80x = 773,612.70 × 347,780.20
  4. Step 4: Simplify right side
    515,741.80x = 269,047,179,528.54
  5. Step 5: Solve for x
    x = 269,047,179,528.54/515,741.80
  6. Step 6: Final answer
    x = 521,670.30

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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.