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Finding the Fourth Proportional to 636,837.40, 878,826 and 350,340.40

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Solution

The fourth proportional to 636,837.40, 878,826 and 350,340.40 is: 483,464.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,837.40 : 878,826 = 350,340.40 : x
  2. Step 2: Convert to fraction form
    636,837.40/878,826 = 350,340.40/x
  3. Step 3: Cross multiply
    636,837.40x = 878,826 × 350,340.40
  4. Step 4: Simplify right side
    636,837.40x = 307,888,252,370.40
  5. Step 5: Solve for x
    x = 307,888,252,370.40/636,837.40
  6. Step 6: Final answer
    x = 483,464.46

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1.5x scale

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.