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Finding the Fourth Proportional to 636,218.87, 953,968.01 and 209,639.03

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Solution

The fourth proportional to 636,218.87, 953,968.01 and 209,639.03 is: 314,339.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,218.87 : 953,968.01 = 209,639.03 : x
  2. Step 2: Convert to fraction form
    636,218.87/953,968.01 = 209,639.03/x
  3. Step 3: Cross multiply
    636,218.87x = 953,968.01 × 209,639.03
  4. Step 4: Simplify right side
    636,218.87x = 199,988,922,449.40
  5. Step 5: Solve for x
    x = 199,988,922,449.40/636,218.87
  6. Step 6: Final answer
    x = 314,339.82

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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.