Home / 699,613.28-965,455.02-393,689.49

Finding the Fourth Proportional to 699,613.28, 965,455.02 and 393,689.49

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Solution

The fourth proportional to 699,613.28, 965,455.02 and 393,689.49 is: 543,285.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,613.28 : 965,455.02 = 393,689.49 : x
  2. Step 2: Convert to fraction form
    699,613.28/965,455.02 = 393,689.49/x
  3. Step 3: Cross multiply
    699,613.28x = 965,455.02 × 393,689.49
  4. Step 4: Simplify right side
    699,613.28x = 380,089,489,344.95
  5. Step 5: Solve for x
    x = 380,089,489,344.95/699,613.28
  6. Step 6: Final answer
    x = 543,285.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.