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Finding the Fourth Proportional to 398,881.37, 550,545.05 and 253,657.72

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Solution

The fourth proportional to 398,881.37, 550,545.05 and 253,657.72 is: 350,104.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,881.37 : 550,545.05 = 253,657.72 : x
  2. Step 2: Convert to fraction form
    398,881.37/550,545.05 = 253,657.72/x
  3. Step 3: Cross multiply
    398,881.37x = 550,545.05 × 253,657.72
  4. Step 4: Simplify right side
    398,881.37x = 139,650,003,462.61
  5. Step 5: Solve for x
    x = 139,650,003,462.61/398,881.37
  6. Step 6: Final answer
    x = 350,104.10

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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.