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Finding the Fourth Proportional to 519,884.40, 779,680.80 and 165,007.20

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Solution

The fourth proportional to 519,884.40, 779,680.80 and 165,007.20 is: 247,464.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,884.40 : 779,680.80 = 165,007.20 : x
  2. Step 2: Convert to fraction form
    519,884.40/779,680.80 = 165,007.20/x
  3. Step 3: Cross multiply
    519,884.40x = 779,680.80 × 165,007.20
  4. Step 4: Simplify right side
    519,884.40x = 128,652,945,701.76
  5. Step 5: Solve for x
    x = 128,652,945,701.76/519,884.40
  6. Step 6: Final answer
    x = 247,464.52

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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.