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Finding the Fourth Proportional to 491,367.35, 737,173.40 and 390,545.78

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Solution

The fourth proportional to 491,367.35, 737,173.40 and 390,545.78 is: 585,915.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,367.35 : 737,173.40 = 390,545.78 : x
  2. Step 2: Convert to fraction form
    491,367.35/737,173.40 = 390,545.78/x
  3. Step 3: Cross multiply
    491,367.35x = 737,173.40 × 390,545.78
  4. Step 4: Simplify right side
    491,367.35x = 287,899,954,859.66
  5. Step 5: Solve for x
    x = 287,899,954,859.66/491,367.35
  6. Step 6: Final answer
    x = 585,915.93

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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.