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Finding the Fourth Proportional to 636,342.90, 878,100.94 and 374,656.60

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Solution

The fourth proportional to 636,342.90, 878,100.94 and 374,656.60 is: 516,995.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,342.90 : 878,100.94 = 374,656.60 : x
  2. Step 2: Convert to fraction form
    636,342.90/878,100.94 = 374,656.60/x
  3. Step 3: Cross multiply
    636,342.90x = 878,100.94 × 374,656.60
  4. Step 4: Simplify right side
    636,342.90x = 328,986,312,095.71
  5. Step 5: Solve for x
    x = 328,986,312,095.71/636,342.90
  6. Step 6: Final answer
    x = 516,995.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.