Home / 386,430.20-579,933.30-199,345.40

Finding the Fourth Proportional to 386,430.20, 579,933.30 and 199,345.40

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Solution

The fourth proportional to 386,430.20, 579,933.30 and 199,345.40 is: 299,166.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,430.20 : 579,933.30 = 199,345.40 : x
  2. Step 2: Convert to fraction form
    386,430.20/579,933.30 = 199,345.40/x
  3. Step 3: Cross multiply
    386,430.20x = 579,933.30 × 199,345.40
  4. Step 4: Simplify right side
    386,430.20x = 115,607,035,661.82
  5. Step 5: Solve for x
    x = 115,607,035,661.82/386,430.20
  6. Step 6: Final answer
    x = 299,166.67

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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.