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Finding the Fourth Proportional to 290,488.89, 435,803.40 and 100,921.65

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Solution

The fourth proportional to 290,488.89, 435,803.40 and 100,921.65 is: 151,406.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,488.89 : 435,803.40 = 100,921.65 : x
  2. Step 2: Convert to fraction form
    290,488.89/435,803.40 = 100,921.65/x
  3. Step 3: Cross multiply
    290,488.89x = 435,803.40 × 100,921.65
  4. Step 4: Simplify right side
    290,488.89x = 43,981,998,203.61
  5. Step 5: Solve for x
    x = 43,981,998,203.61/290,488.89
  6. Step 6: Final answer
    x = 151,406.82

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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.