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Finding the Fourth Proportional to 543,515.40, 811,613.19 and 443,873.40

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Solution

The fourth proportional to 543,515.40, 811,613.19 and 443,873.40 is: 662,821.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,515.40 : 811,613.19 = 443,873.40 : x
  2. Step 2: Convert to fraction form
    543,515.40/811,613.19 = 443,873.40/x
  3. Step 3: Cross multiply
    543,515.40x = 811,613.19 × 443,873.40
  4. Step 4: Simplify right side
    543,515.40x = 360,253,506,130.15
  5. Step 5: Solve for x
    x = 360,253,506,130.15/543,515.40
  6. Step 6: Final answer
    x = 662,821.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.