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Finding the Fourth Proportional to 290,567.86, 400,947.78 and 168,081.28

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Solution

The fourth proportional to 290,567.86, 400,947.78 and 168,081.28 is: 231,931.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,567.86 : 400,947.78 = 168,081.28 : x
  2. Step 2: Convert to fraction form
    290,567.86/400,947.78 = 168,081.28/x
  3. Step 3: Cross multiply
    290,567.86x = 400,947.78 × 168,081.28
  4. Step 4: Simplify right side
    290,567.86x = 67,391,816,075.56
  5. Step 5: Solve for x
    x = 67,391,816,075.56/290,567.86
  6. Step 6: Final answer
    x = 231,931.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.