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Finding the Fourth Proportional to 443,618.90, 612,195.75 and 280,347.96

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Solution

The fourth proportional to 443,618.90, 612,195.75 and 280,347.96 is: 386,881.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,618.90 : 612,195.75 = 280,347.96 : x
  2. Step 2: Convert to fraction form
    443,618.90/612,195.75 = 280,347.96/x
  3. Step 3: Cross multiply
    443,618.90x = 612,195.75 × 280,347.96
  4. Step 4: Simplify right side
    443,618.90x = 171,627,829,633.17
  5. Step 5: Solve for x
    x = 171,627,829,633.17/443,618.90
  6. Step 6: Final answer
    x = 386,881.24

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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.