Home / 431,272.20-646,908.30-221,320.20

Finding the Fourth Proportional to 431,272.20, 646,908.30 and 221,320.20

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Solution

The fourth proportional to 431,272.20, 646,908.30 and 221,320.20 is: 331,980.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,272.20 : 646,908.30 = 221,320.20 : x
  2. Step 2: Convert to fraction form
    431,272.20/646,908.30 = 221,320.20/x
  3. Step 3: Cross multiply
    431,272.20x = 646,908.30 × 221,320.20
  4. Step 4: Simplify right side
    431,272.20x = 143,173,874,337.66
  5. Step 5: Solve for x
    x = 143,173,874,337.66/431,272.20
  6. Step 6: Final answer
    x = 331,980.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.