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Finding the Fourth Proportional to 443,315.57, 665,066.73 and 143,772.78

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Solution

The fourth proportional to 443,315.57, 665,066.73 and 143,772.78 is: 215,689.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,315.57 : 665,066.73 = 143,772.78 : x
  2. Step 2: Convert to fraction form
    443,315.57/665,066.73 = 143,772.78/x
  3. Step 3: Cross multiply
    443,315.57x = 665,066.73 × 143,772.78
  4. Step 4: Simplify right side
    443,315.57x = 95,618,492,657.61
  5. Step 5: Solve for x
    x = 95,618,492,657.61/443,315.57
  6. Step 6: Final answer
    x = 215,689.45

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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.