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Finding the Fourth Proportional to 443,846.61, 665,774.78 and 128,306.25

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Solution

The fourth proportional to 443,846.61, 665,774.78 and 128,306.25 is: 192,460.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,846.61 : 665,774.78 = 128,306.25 : x
  2. Step 2: Convert to fraction form
    443,846.61/665,774.78 = 128,306.25/x
  3. Step 3: Cross multiply
    443,846.61x = 665,774.78 × 128,306.25
  4. Step 4: Simplify right side
    443,846.61x = 85,423,064,724.84
  5. Step 5: Solve for x
    x = 85,423,064,724.84/443,846.61
  6. Step 6: Final answer
    x = 192,460.78

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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.