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Finding the Fourth Proportional to 388,815.78, 583,223.64 and 93,327.78

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Solution

The fourth proportional to 388,815.78, 583,223.64 and 93,327.78 is: 139,991.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,815.78 : 583,223.64 = 93,327.78 : x
  2. Step 2: Convert to fraction form
    388,815.78/583,223.64 = 93,327.78/x
  3. Step 3: Cross multiply
    388,815.78x = 583,223.64 × 93,327.78
  4. Step 4: Simplify right side
    388,815.78x = 54,430,967,564.72
  5. Step 5: Solve for x
    x = 54,430,967,564.72/388,815.78
  6. Step 6: Final answer
    x = 139,991.66

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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.