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Finding the Fourth Proportional to 398,879.46, 550,656.72 and 308,031.48

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Solution

The fourth proportional to 398,879.46, 550,656.72 and 308,031.48 is: 425,240.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,879.46 : 550,656.72 = 308,031.48 : x
  2. Step 2: Convert to fraction form
    398,879.46/550,656.72 = 308,031.48/x
  3. Step 3: Cross multiply
    398,879.46x = 550,656.72 × 308,031.48
  4. Step 4: Simplify right side
    398,879.46x = 169,619,604,433.55
  5. Step 5: Solve for x
    x = 169,619,604,433.55/398,879.46
  6. Step 6: Final answer
    x = 425,240.26

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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.