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Finding the Fourth Proportional to 443,838.74, 665,762.97 and 128,298.38

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Solution

The fourth proportional to 443,838.74, 665,762.97 and 128,298.38 is: 192,448.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,838.74 : 665,762.97 = 128,298.38 : x
  2. Step 2: Convert to fraction form
    443,838.74/665,762.97 = 128,298.38/x
  3. Step 3: Cross multiply
    443,838.74x = 665,762.97 × 128,298.38
  4. Step 4: Simplify right side
    443,838.74x = 85,416,307,186.17
  5. Step 5: Solve for x
    x = 85,416,307,186.17/443,838.74
  6. Step 6: Final answer
    x = 192,448.97

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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.