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Finding the Fourth Proportional to 986,609.60, 1,479,266.40 and 387,209.60

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Solution

The fourth proportional to 986,609.60, 1,479,266.40 and 387,209.60 is: 580,560.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,609.60 : 1,479,266.40 = 387,209.60 : x
  2. Step 2: Convert to fraction form
    986,609.60/1,479,266.40 = 387,209.60/x
  3. Step 3: Cross multiply
    986,609.60x = 1,479,266.40 × 387,209.60
  4. Step 4: Simplify right side
    986,609.60x = 572,786,151,037.44
  5. Step 5: Solve for x
    x = 572,786,151,037.44/986,609.60
  6. Step 6: Final answer
    x = 580,560.08

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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.