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Finding the Fourth Proportional to 202,391.90, 303,328.65 and 155,411.90

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Solution

The fourth proportional to 202,391.90, 303,328.65 and 155,411.90 is: 232,918.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,391.90 : 303,328.65 = 155,411.90 : x
  2. Step 2: Convert to fraction form
    202,391.90/303,328.65 = 155,411.90/x
  3. Step 3: Cross multiply
    202,391.90x = 303,328.65 × 155,411.90
  4. Step 4: Simplify right side
    202,391.90x = 47,140,881,820.94
  5. Step 5: Solve for x
    x = 47,140,881,820.94/202,391.90
  6. Step 6: Final answer
    x = 232,918.82

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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.