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Finding the Fourth Proportional to 636,963.12, 878,987.16 and 350,456.40

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Solution

The fourth proportional to 636,963.12, 878,987.16 and 350,456.40 is: 483,617.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,963.12 : 878,987.16 = 350,456.40 : x
  2. Step 2: Convert to fraction form
    636,963.12/878,987.16 = 350,456.40/x
  3. Step 3: Cross multiply
    636,963.12x = 878,987.16 × 350,456.40
  4. Step 4: Simplify right side
    636,963.12x = 308,046,675,739.82
  5. Step 5: Solve for x
    x = 308,046,675,739.82/636,963.12
  6. Step 6: Final answer
    x = 483,617.76

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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.