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Finding the Fourth Proportional to 443,423.04, 664,670.16 and 206,570.40

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Solution

The fourth proportional to 443,423.04, 664,670.16 and 206,570.40 is: 309,639.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,423.04 : 664,670.16 = 206,570.40 : x
  2. Step 2: Convert to fraction form
    443,423.04/664,670.16 = 206,570.40/x
  3. Step 3: Cross multiply
    443,423.04x = 664,670.16 × 206,570.40
  4. Step 4: Simplify right side
    443,423.04x = 137,301,180,819.26
  5. Step 5: Solve for x
    x = 137,301,180,819.26/443,423.04
  6. Step 6: Final answer
    x = 309,639.26

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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.