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Finding the Fourth Proportional to 621,405.70, 857,531.72 and 349,473.52

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Solution

The fourth proportional to 621,405.70, 857,531.72 and 349,473.52 is: 482,268.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,405.70 : 857,531.72 = 349,473.52 : x
  2. Step 2: Convert to fraction form
    621,405.70/857,531.72 = 349,473.52/x
  3. Step 3: Cross multiply
    621,405.70x = 857,531.72 × 349,473.52
  4. Step 4: Simplify right side
    621,405.70x = 299,684,628,700.05
  5. Step 5: Solve for x
    x = 299,684,628,700.05/621,405.70
  6. Step 6: Final answer
    x = 482,268.88

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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.