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Finding the Fourth Proportional to 219,200.90, 328,218.15 and 139,885.70

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Solution

The fourth proportional to 219,200.90, 328,218.15 and 139,885.70 is: 209,456.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,200.90 : 328,218.15 = 139,885.70 : x
  2. Step 2: Convert to fraction form
    219,200.90/328,218.15 = 139,885.70/x
  3. Step 3: Cross multiply
    219,200.90x = 328,218.15 × 139,885.70
  4. Step 4: Simplify right side
    219,200.90x = 45,913,025,665.46
  5. Step 5: Solve for x
    x = 45,913,025,665.46/219,200.90
  6. Step 6: Final answer
    x = 209,456.37

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1.5x scale

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.