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Finding the Fourth Proportional to 806,516.80, 1,209,256.80 and 333,390.40

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Solution

The fourth proportional to 806,516.80, 1,209,256.80 and 333,390.40 is: 499,871.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,516.80 : 1,209,256.80 = 333,390.40 : x
  2. Step 2: Convert to fraction form
    806,516.80/1,209,256.80 = 333,390.40/x
  3. Step 3: Cross multiply
    806,516.80x = 1,209,256.80 × 333,390.40
  4. Step 4: Simplify right side
    806,516.80x = 403,154,608,254.72
  5. Step 5: Solve for x
    x = 403,154,608,254.72/806,516.80
  6. Step 6: Final answer
    x = 499,871.31

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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.