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Finding the Fourth Proportional to 443,348.19, 665,115.80 and 143,805.51

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Solution

The fourth proportional to 443,348.19, 665,115.80 and 143,805.51 is: 215,738.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,348.19 : 665,115.80 = 143,805.51 : x
  2. Step 2: Convert to fraction form
    443,348.19/665,115.80 = 143,805.51/x
  3. Step 3: Cross multiply
    443,348.19x = 665,115.80 × 143,805.51
  4. Step 4: Simplify right side
    443,348.19x = 95,647,316,828.06
  5. Step 5: Solve for x
    x = 95,647,316,828.06/443,348.19
  6. Step 6: Final answer
    x = 215,738.60

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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.