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Finding the Fourth Proportional to 349,812.80, 524,978.40 and 139,601.60

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Solution

The fourth proportional to 349,812.80, 524,978.40 and 139,601.60 is: 209,505.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    349,812.80 : 524,978.40 = 139,601.60 : x
  2. Step 2: Convert to fraction form
    349,812.80/524,978.40 = 139,601.60/x
  3. Step 3: Cross multiply
    349,812.80x = 524,978.40 × 139,601.60
  4. Step 4: Simplify right side
    349,812.80x = 73,287,824,605.44
  5. Step 5: Solve for x
    x = 73,287,824,605.44/349,812.80
  6. Step 6: Final answer
    x = 209,505.84

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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.