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Finding the Fourth Proportional to 290,520.28, 435,796.78 and 103,531.76

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Solution

The fourth proportional to 290,520.28, 435,796.78 and 103,531.76 is: 155,303.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,520.28 : 435,796.78 = 103,531.76 : x
  2. Step 2: Convert to fraction form
    290,520.28/435,796.78 = 103,531.76/x
  3. Step 3: Cross multiply
    290,520.28x = 435,796.78 × 103,531.76
  4. Step 4: Simplify right side
    290,520.28x = 45,118,807,635.73
  5. Step 5: Solve for x
    x = 45,118,807,635.73/290,520.28
  6. Step 6: Final answer
    x = 155,303.47

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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.