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Finding the Fourth Proportional to 625,122.69, 862,669.71 and 338,643.91

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Solution

The fourth proportional to 625,122.69, 862,669.71 and 338,643.91 is: 467,328.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,122.69 : 862,669.71 = 338,643.91 : x
  2. Step 2: Convert to fraction form
    625,122.69/862,669.71 = 338,643.91/x
  3. Step 3: Cross multiply
    625,122.69x = 862,669.71 × 338,643.91
  4. Step 4: Simplify right side
    625,122.69x = 292,137,843,632.97
  5. Step 5: Solve for x
    x = 292,137,843,632.97/625,122.69
  6. Step 6: Final answer
    x = 467,328.81

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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.