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Finding the Fourth Proportional to 323,620.40, 485,430.18 and 86,963.10

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Solution

The fourth proportional to 323,620.40, 485,430.18 and 86,963.10 is: 130,444.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,620.40 : 485,430.18 = 86,963.10 : x
  2. Step 2: Convert to fraction form
    323,620.40/485,430.18 = 86,963.10/x
  3. Step 3: Cross multiply
    323,620.40x = 485,430.18 × 86,963.10
  4. Step 4: Simplify right side
    323,620.40x = 42,214,511,139.88
  5. Step 5: Solve for x
    x = 42,214,511,139.88/323,620.40
  6. Step 6: Final answer
    x = 130,444.53

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1.5x scale

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.