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Finding the Fourth Proportional to 516,220.20, 712,361.86 and 301,372.20

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Solution

The fourth proportional to 516,220.20, 712,361.86 and 301,372.20 is: 415,880.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,220.20 : 712,361.86 = 301,372.20 : x
  2. Step 2: Convert to fraction form
    516,220.20/712,361.86 = 301,372.20/x
  3. Step 3: Cross multiply
    516,220.20x = 712,361.86 × 301,372.20
  4. Step 4: Simplify right side
    516,220.20x = 214,686,060,944.29
  5. Step 5: Solve for x
    x = 214,686,060,944.29/516,220.20
  6. Step 6: Final answer
    x = 415,880.78

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.