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Finding the Fourth Proportional to 358,978.40, 538,462.80 and 109,661.60

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Solution

The fourth proportional to 358,978.40, 538,462.80 and 109,661.60 is: 164,490.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,978.40 : 538,462.80 = 109,661.60 : x
  2. Step 2: Convert to fraction form
    358,978.40/538,462.80 = 109,661.60/x
  3. Step 3: Cross multiply
    358,978.40x = 538,462.80 × 109,661.60
  4. Step 4: Simplify right side
    358,978.40x = 59,048,692,188.48
  5. Step 5: Solve for x
    x = 59,048,692,188.48/358,978.40
  6. Step 6: Final answer
    x = 164,490.93

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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.