Home / 398,829.30-550,587.42-307,981.32

Finding the Fourth Proportional to 398,829.30, 550,587.42 and 307,981.32

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Solution

The fourth proportional to 398,829.30, 550,587.42 and 307,981.32 is: 425,170.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,829.30 : 550,587.42 = 307,981.32 : x
  2. Step 2: Convert to fraction form
    398,829.30/550,587.42 = 307,981.32/x
  3. Step 3: Cross multiply
    398,829.30x = 550,587.42 × 307,981.32
  4. Step 4: Simplify right side
    398,829.30x = 169,570,640,386.99
  5. Step 5: Solve for x
    x = 169,570,640,386.99/398,829.30
  6. Step 6: Final answer
    x = 425,170.97

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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.