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Finding the Fourth Proportional to 286,810.56, 430,212.18 and 128,927.38

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Solution

The fourth proportional to 286,810.56, 430,212.18 and 128,927.38 is: 193,389.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,810.56 : 430,212.18 = 128,927.38 : x
  2. Step 2: Convert to fraction form
    286,810.56/430,212.18 = 128,927.38/x
  3. Step 3: Cross multiply
    286,810.56x = 430,212.18 × 128,927.38
  4. Step 4: Simplify right side
    286,810.56x = 55,466,129,211.49
  5. Step 5: Solve for x
    x = 55,466,129,211.49/286,810.56
  6. Step 6: Final answer
    x = 193,389.42

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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.