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Finding the Fourth Proportional to 443,457.40, 665,121.30 and 127,881.40

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Solution

The fourth proportional to 443,457.40, 665,121.30 and 127,881.40 is: 191,803.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,457.40 : 665,121.30 = 127,881.40 : x
  2. Step 2: Convert to fraction form
    443,457.40/665,121.30 = 127,881.40/x
  3. Step 3: Cross multiply
    443,457.40x = 665,121.30 × 127,881.40
  4. Step 4: Simplify right side
    443,457.40x = 85,056,643,013.82
  5. Step 5: Solve for x
    x = 85,056,643,013.82/443,457.40
  6. Step 6: Final answer
    x = 191,803.41

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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.