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Finding the Fourth Proportional to 663,165.72, 915,169.86 and 361,359.72

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Solution

The fourth proportional to 663,165.72, 915,169.86 and 361,359.72 is: 498,677.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,165.72 : 915,169.86 = 361,359.72 : x
  2. Step 2: Convert to fraction form
    663,165.72/915,169.86 = 361,359.72/x
  3. Step 3: Cross multiply
    663,165.72x = 915,169.86 × 361,359.72
  4. Step 4: Simplify right side
    663,165.72x = 330,705,524,362.04
  5. Step 5: Solve for x
    x = 330,705,524,362.04/663,165.72
  6. Step 6: Final answer
    x = 498,677.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.