Home / 642,282.72-886,350.16-355,821.36

Finding the Fourth Proportional to 642,282.72, 886,350.16 and 355,821.36

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Solution

The fourth proportional to 642,282.72, 886,350.16 and 355,821.36 is: 491,033.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,282.72 : 886,350.16 = 355,821.36 : x
  2. Step 2: Convert to fraction form
    642,282.72/886,350.16 = 355,821.36/x
  3. Step 3: Cross multiply
    642,282.72x = 886,350.16 × 355,821.36
  4. Step 4: Simplify right side
    642,282.72x = 315,382,314,935.67
  5. Step 5: Solve for x
    x = 315,382,314,935.67/642,282.72
  6. Step 6: Final answer
    x = 491,033.48

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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.