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Finding the Fourth Proportional to 665,323.20, 998,611.20 and 350,006.40

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Solution

The fourth proportional to 665,323.20, 998,611.20 and 350,006.40 is: 525,339.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,323.20 : 998,611.20 = 350,006.40 : x
  2. Step 2: Convert to fraction form
    665,323.20/998,611.20 = 350,006.40/x
  3. Step 3: Cross multiply
    665,323.20x = 998,611.20 × 350,006.40
  4. Step 4: Simplify right side
    665,323.20x = 349,520,311,111.68
  5. Step 5: Solve for x
    x = 349,520,311,111.68/665,323.20
  6. Step 6: Final answer
    x = 525,339.13

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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.