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Finding the Fourth Proportional to 350,112.80, 525,428.40 and 139,901.60

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Solution

The fourth proportional to 350,112.80, 525,428.40 and 139,901.60 is: 209,955.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    350,112.80 : 525,428.40 = 139,901.60 : x
  2. Step 2: Convert to fraction form
    350,112.80/525,428.40 = 139,901.60/x
  3. Step 3: Cross multiply
    350,112.80x = 525,428.40 × 139,901.60
  4. Step 4: Simplify right side
    350,112.80x = 73,508,273,845.44
  5. Step 5: Solve for x
    x = 73,508,273,845.44/350,112.80
  6. Step 6: Final answer
    x = 209,955.97

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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.