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Finding the Fourth Proportional to 443,430.30, 665,145.45 and 409,215.90

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Solution

The fourth proportional to 443,430.30, 665,145.45 and 409,215.90 is: 613,823.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,430.30 : 665,145.45 = 409,215.90 : x
  2. Step 2: Convert to fraction form
    443,430.30/665,145.45 = 409,215.90/x
  3. Step 3: Cross multiply
    443,430.30x = 665,145.45 × 409,215.90
  4. Step 4: Simplify right side
    443,430.30x = 272,188,093,952.66
  5. Step 5: Solve for x
    x = 272,188,093,952.66/443,430.30
  6. Step 6: Final answer
    x = 613,823.85

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1.5x scale

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.