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Finding the Fourth Proportional to 621,659.81, 857,841.48 and 349,673.55

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Solution

The fourth proportional to 621,659.81, 857,841.48 and 349,673.55 is: 482,521.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,659.81 : 857,841.48 = 349,673.55 : x
  2. Step 2: Convert to fraction form
    621,659.81/857,841.48 = 349,673.55/x
  3. Step 3: Cross multiply
    621,659.81x = 857,841.48 × 349,673.55
  4. Step 4: Simplify right side
    621,659.81x = 299,964,475,648.85
  5. Step 5: Solve for x
    x = 299,964,475,648.85/621,659.81
  6. Step 6: Final answer
    x = 482,521.91

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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.