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Finding the Fourth Proportional to 443,848.99, 665,778.34 and 128,308.63

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Solution

The fourth proportional to 443,848.99, 665,778.34 and 128,308.63 is: 192,464.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,848.99 : 665,778.34 = 128,308.63 : x
  2. Step 2: Convert to fraction form
    443,848.99/665,778.34 = 128,308.63/x
  3. Step 3: Cross multiply
    443,848.99x = 665,778.34 × 128,308.63
  4. Step 4: Simplify right side
    443,848.99x = 85,425,106,689.07
  5. Step 5: Solve for x
    x = 85,425,106,689.07/443,848.99
  6. Step 6: Final answer
    x = 192,464.35

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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.