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Finding the Fourth Proportional to 404,390.85, 606,657.66 and 138,088.98

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Solution

The fourth proportional to 404,390.85, 606,657.66 and 138,088.98 is: 207,157.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,390.85 : 606,657.66 = 138,088.98 : x
  2. Step 2: Convert to fraction form
    404,390.85/606,657.66 = 138,088.98/x
  3. Step 3: Cross multiply
    404,390.85x = 606,657.66 × 138,088.98
  4. Step 4: Simplify right side
    404,390.85x = 83,772,737,478.59
  5. Step 5: Solve for x
    x = 83,772,737,478.59/404,390.85
  6. Step 6: Final answer
    x = 207,157.85

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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.