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Finding the Fourth Proportional to 424,386.45, 636,860.10 and 199,811.10

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Solution

The fourth proportional to 424,386.45, 636,860.10 and 199,811.10 is: 299,848.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,386.45 : 636,860.10 = 199,811.10 : x
  2. Step 2: Convert to fraction form
    424,386.45/636,860.10 = 199,811.10/x
  3. Step 3: Cross multiply
    424,386.45x = 636,860.10 × 199,811.10
  4. Step 4: Simplify right side
    424,386.45x = 127,251,717,127.11
  5. Step 5: Solve for x
    x = 127,251,717,127.11/424,386.45
  6. Step 6: Final answer
    x = 299,848.68

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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.