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Finding the Fourth Proportional to 443,617.21, 612,193.43 and 280,346.28

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Solution

The fourth proportional to 443,617.21, 612,193.43 and 280,346.28 is: 386,878.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,617.21 : 612,193.43 = 280,346.28 : x
  2. Step 2: Convert to fraction form
    443,617.21/612,193.43 = 280,346.28/x
  3. Step 3: Cross multiply
    443,617.21x = 612,193.43 × 280,346.28
  4. Step 4: Simplify right side
    443,617.21x = 171,626,146,278.24
  5. Step 5: Solve for x
    x = 171,626,146,278.24/443,617.21
  6. Step 6: Final answer
    x = 386,878.92

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1.5x scale

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.