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Finding the Fourth Proportional to 806,479.20, 1,210,156.20 and 333,212.40

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Solution

The fourth proportional to 806,479.20, 1,210,156.20 and 333,212.40 is: 499,999.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,479.20 : 1,210,156.20 = 333,212.40 : x
  2. Step 2: Convert to fraction form
    806,479.20/1,210,156.20 = 333,212.40/x
  3. Step 3: Cross multiply
    806,479.20x = 1,210,156.20 × 333,212.40
  4. Step 4: Simplify right side
    806,479.20x = 403,239,051,776.88
  5. Step 5: Solve for x
    x = 403,239,051,776.88/806,479.20
  6. Step 6: Final answer
    x = 499,999.32

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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.