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Finding the Fourth Proportional to 621,649.68, 857,795.85 and 349,708.38

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Solution

The fourth proportional to 621,649.68, 857,795.85 and 349,708.38 is: 482,552.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,649.68 : 857,795.85 = 349,708.38 : x
  2. Step 2: Convert to fraction form
    621,649.68/857,795.85 = 349,708.38/x
  3. Step 3: Cross multiply
    621,649.68x = 857,795.85 × 349,708.38
  4. Step 4: Simplify right side
    621,649.68x = 299,978,397,074.22
  5. Step 5: Solve for x
    x = 299,978,397,074.22/621,649.68
  6. Step 6: Final answer
    x = 482,552.16

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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.