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Finding the Fourth Proportional to 515,090.40, 772,635.60 and 347,128.80

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Solution

The fourth proportional to 515,090.40, 772,635.60 and 347,128.80 is: 520,693.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,090.40 : 772,635.60 = 347,128.80 : x
  2. Step 2: Convert to fraction form
    515,090.40/772,635.60 = 347,128.80/x
  3. Step 3: Cross multiply
    515,090.40x = 772,635.60 × 347,128.80
  4. Step 4: Simplify right side
    515,090.40x = 268,204,068,665.28
  5. Step 5: Solve for x
    x = 268,204,068,665.28/515,090.40
  6. Step 6: Final answer
    x = 520,693.20

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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.