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Finding the Fourth Proportional to 986,439.54, 1,478,770.71 and 354,909

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Solution

The fourth proportional to 986,439.54, 1,478,770.71 and 354,909 is: 532,043.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,439.54 : 1,478,770.71 = 354,909 : x
  2. Step 2: Convert to fraction form
    986,439.54/1,478,770.71 = 354,909/x
  3. Step 3: Cross multiply
    986,439.54x = 1,478,770.71 × 354,909
  4. Step 4: Simplify right side
    986,439.54x = 524,829,033,915.39
  5. Step 5: Solve for x
    x = 524,829,033,915.39/986,439.54
  6. Step 6: Final answer
    x = 532,043.79

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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.