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Finding the Fourth Proportional to 296,857.91, 445,275.93 and 128,420.64

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Solution

The fourth proportional to 296,857.91, 445,275.93 and 128,420.64 is: 192,626.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,857.91 : 445,275.93 = 128,420.64 : x
  2. Step 2: Convert to fraction form
    296,857.91/445,275.93 = 128,420.64/x
  3. Step 3: Cross multiply
    296,857.91x = 445,275.93 × 128,420.64
  4. Step 4: Simplify right side
    296,857.91x = 57,182,620,388.77
  5. Step 5: Solve for x
    x = 57,182,620,388.77/296,857.91
  6. Step 6: Final answer
    x = 192,626.23

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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.