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Finding the Fourth Proportional to 388,666.83, 583,021.17 and 122,448.18

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Solution

The fourth proportional to 388,666.83, 583,021.17 and 122,448.18 is: 183,678.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,666.83 : 583,021.17 = 122,448.18 : x
  2. Step 2: Convert to fraction form
    388,666.83/583,021.17 = 122,448.18/x
  3. Step 3: Cross multiply
    388,666.83x = 583,021.17 × 122,448.18
  4. Step 4: Simplify right side
    388,666.83x = 71,389,881,167.97
  5. Step 5: Solve for x
    x = 71,389,881,167.97/388,666.83
  6. Step 6: Final answer
    x = 183,678.86

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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.