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Finding the Fourth Proportional to 519,631.76, 779,359.80 and 145,568.72

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Solution

The fourth proportional to 519,631.76, 779,359.80 and 145,568.72 is: 218,328.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,631.76 : 779,359.80 = 145,568.72 : x
  2. Step 2: Convert to fraction form
    519,631.76/779,359.80 = 145,568.72/x
  3. Step 3: Cross multiply
    519,631.76x = 779,359.80 × 145,568.72
  4. Step 4: Simplify right side
    519,631.76x = 113,450,408,505.46
  5. Step 5: Solve for x
    x = 113,450,408,505.46/519,631.76
  6. Step 6: Final answer
    x = 218,328.47

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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.