Home / 621,145.80-857,161.35-349,225.20

Finding the Fourth Proportional to 621,145.80, 857,161.35 and 349,225.20

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Solution

The fourth proportional to 621,145.80, 857,161.35 and 349,225.20 is: 481,919.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,145.80 : 857,161.35 = 349,225.20 : x
  2. Step 2: Convert to fraction form
    621,145.80/857,161.35 = 349,225.20/x
  3. Step 3: Cross multiply
    621,145.80x = 857,161.35 × 349,225.20
  4. Step 4: Simplify right side
    621,145.80x = 299,342,343,886.02
  5. Step 5: Solve for x
    x = 299,342,343,886.02/621,145.80
  6. Step 6: Final answer
    x = 481,919.61

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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.