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Finding the Fourth Proportional to 519,884.20, 779,826.30 and 317,805.40

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Solution

The fourth proportional to 519,884.20, 779,826.30 and 317,805.40 is: 476,708.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,884.20 : 779,826.30 = 317,805.40 : x
  2. Step 2: Convert to fraction form
    519,884.20/779,826.30 = 317,805.40/x
  3. Step 3: Cross multiply
    519,884.20x = 779,826.30 × 317,805.40
  4. Step 4: Simplify right side
    519,884.20x = 247,833,009,202.02
  5. Step 5: Solve for x
    x = 247,833,009,202.02/519,884.20
  6. Step 6: Final answer
    x = 476,708.10

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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.