Home / 386,427.20-579,928.80-199,342.40

Finding the Fourth Proportional to 386,427.20, 579,928.80 and 199,342.40

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Solution

The fourth proportional to 386,427.20, 579,928.80 and 199,342.40 is: 299,162.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,427.20 : 579,928.80 = 199,342.40 : x
  2. Step 2: Convert to fraction form
    386,427.20/579,928.80 = 199,342.40/x
  3. Step 3: Cross multiply
    386,427.20x = 579,928.80 × 199,342.40
  4. Step 4: Simplify right side
    386,427.20x = 115,604,398,821.12
  5. Step 5: Solve for x
    x = 115,604,398,821.12/386,427.20
  6. Step 6: Final answer
    x = 299,162.17

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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.