Home / 398,465,617.80-550,058,899.26-257,405,632.61

Finding the Fourth Proportional to 398,465,617.80, 550,058,899.26 and 257,405,632.61

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Solution

The fourth proportional to 398,465,617.80, 550,058,899.26 and 257,405,632.61 is: 355,333,691.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,465,617.80 : 550,058,899.26 = 257,405,632.61 : x
  2. Step 2: Convert to fraction form
    398,465,617.80/550,058,899.26 = 257,405,632.61/x
  3. Step 3: Cross multiply
    398,465,617.80x = 550,058,899.26 × 257,405,632.61
  4. Step 4: Simplify right side
    398,465,617.80x = 141,588,258,934,030,256
  5. Step 5: Solve for x
    x = 141,588,258,934,030,256/398,465,617.80
  6. Step 6: Final answer
    x = 355,333,691.56

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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.