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Finding the Fourth Proportional to 681,478.97, 939,803.09 and 538,580.39

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Solution

The fourth proportional to 681,478.97, 939,803.09 and 538,580.39 is: 742,736.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,478.97 : 939,803.09 = 538,580.39 : x
  2. Step 2: Convert to fraction form
    681,478.97/939,803.09 = 538,580.39/x
  3. Step 3: Cross multiply
    681,478.97x = 939,803.09 × 538,580.39
  4. Step 4: Simplify right side
    681,478.97x = 506,159,507,343.49
  5. Step 5: Solve for x
    x = 506,159,507,343.49/681,478.97
  6. Step 6: Final answer
    x = 742,736.80

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Double scale
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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.