Home / 386,465.20-579,985.80-199,380.40

Finding the Fourth Proportional to 386,465.20, 579,985.80 and 199,380.40

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Solution

The fourth proportional to 386,465.20, 579,985.80 and 199,380.40 is: 299,219.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,465.20 : 579,985.80 = 199,380.40 : x
  2. Step 2: Convert to fraction form
    386,465.20/579,985.80 = 199,380.40/x
  3. Step 3: Cross multiply
    386,465.20x = 579,985.80 × 199,380.40
  4. Step 4: Simplify right side
    386,465.20x = 115,637,800,798.32
  5. Step 5: Solve for x
    x = 115,637,800,798.32/386,465.20
  6. Step 6: Final answer
    x = 299,219.18

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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.