Home / 430,145.40-643,905.90-382,906.20

Finding the Fourth Proportional to 430,145.40, 643,905.90 and 382,906.20

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Solution

The fourth proportional to 430,145.40, 643,905.90 and 382,906.20 is: 573,191.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,145.40 : 643,905.90 = 382,906.20 : x
  2. Step 2: Convert to fraction form
    430,145.40/643,905.90 = 382,906.20/x
  3. Step 3: Cross multiply
    430,145.40x = 643,905.90 × 382,906.20
  4. Step 4: Simplify right side
    430,145.40x = 246,555,561,326.58
  5. Step 5: Solve for x
    x = 246,555,561,326.58/430,145.40
  6. Step 6: Final answer
    x = 573,191.21

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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.