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Finding the Fourth Proportional to 286,633.65, 429,960.33 and 128,862.66

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Solution

The fourth proportional to 286,633.65, 429,960.33 and 128,862.66 is: 193,298.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,633.65 : 429,960.33 = 128,862.66 : x
  2. Step 2: Convert to fraction form
    286,633.65/429,960.33 = 128,862.66/x
  3. Step 3: Cross multiply
    286,633.65x = 429,960.33 × 128,862.66
  4. Step 4: Simplify right side
    286,633.65x = 55,405,831,818.28
  5. Step 5: Solve for x
    x = 55,405,831,818.28/286,633.65
  6. Step 6: Final answer
    x = 193,298.42

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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.