Home / 989,725.80-1,389,348.60-989,725.80

Finding the Fourth Proportional to 989,725.80, 1,389,348.60 and 989,725.80

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Solution

The fourth proportional to 989,725.80, 1,389,348.60 and 989,725.80 is: 1,389,348.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,725.80 : 1,389,348.60 = 989,725.80 : x
  2. Step 2: Convert to fraction form
    989,725.80/1,389,348.60 = 989,725.80/x
  3. Step 3: Cross multiply
    989,725.80x = 1,389,348.60 × 989,725.80
  4. Step 4: Simplify right side
    989,725.80x = 1,375,074,154,613.88
  5. Step 5: Solve for x
    x = 1,375,074,154,613.88/989,725.80
  6. Step 6: Final answer
    x = 1,389,348.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.