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Finding the Fourth Proportional to 1,985,246.90, 2,976,418.74 and 636,641.90

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Solution

The fourth proportional to 1,985,246.90, 2,976,418.74 and 636,641.90 is: 954,497.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985,246.90 : 2,976,418.74 = 636,641.90 : x
  2. Step 2: Convert to fraction form
    1,985,246.90/2,976,418.74 = 636,641.90/x
  3. Step 3: Cross multiply
    1,985,246.90x = 2,976,418.74 × 636,641.90
  4. Step 4: Simplify right side
    1,985,246.90x = 1,894,912,881,829.21
  5. Step 5: Solve for x
    x = 1,894,912,881,829.21/1,985,246.90
  6. Step 6: Final answer
    x = 954,497.34

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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.