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Finding the Fourth Proportional to 667,407.35, 921,017.40 and 361,476.65

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Solution

The fourth proportional to 667,407.35, 921,017.40 and 361,476.65 is: 498,835.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,407.35 : 921,017.40 = 361,476.65 : x
  2. Step 2: Convert to fraction form
    667,407.35/921,017.40 = 361,476.65/x
  3. Step 3: Cross multiply
    667,407.35x = 921,017.40 × 361,476.65
  4. Step 4: Simplify right side
    667,407.35x = 332,926,284,343.71
  5. Step 5: Solve for x
    x = 332,926,284,343.71/667,407.35
  6. Step 6: Final answer
    x = 498,835.21

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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.