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Finding the Fourth Proportional to 424,386.56, 636,860.28 and 199,811.22

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Solution

The fourth proportional to 424,386.56, 636,860.28 and 199,811.22 is: 299,848.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,386.56 : 636,860.28 = 199,811.22 : x
  2. Step 2: Convert to fraction form
    424,386.56/636,860.28 = 199,811.22/x
  3. Step 3: Cross multiply
    424,386.56x = 636,860.28 × 199,811.22
  4. Step 4: Simplify right side
    424,386.56x = 127,251,829,516.34
  5. Step 5: Solve for x
    x = 127,251,829,516.34/424,386.56
  6. Step 6: Final answer
    x = 299,848.87

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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.