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Finding the Fourth Proportional to 611,778.71, 917,979.71 and 433,013.33

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Solution

The fourth proportional to 611,778.71, 917,979.71 and 433,013.33 is: 649,740.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,778.71 : 917,979.71 = 433,013.33 : x
  2. Step 2: Convert to fraction form
    611,778.71/917,979.71 = 433,013.33/x
  3. Step 3: Cross multiply
    611,778.71x = 917,979.71 × 433,013.33
  4. Step 4: Simplify right side
    611,778.71x = 397,497,444,344.57
  5. Step 5: Solve for x
    x = 397,497,444,344.57/611,778.71
  6. Step 6: Final answer
    x = 649,740.57

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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.