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Finding the Fourth Proportional to 219,211.40, 328,817.10 and 112,923.20

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Solution

The fourth proportional to 219,211.40, 328,817.10 and 112,923.20 is: 169,384.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,211.40 : 328,817.10 = 112,923.20 : x
  2. Step 2: Convert to fraction form
    219,211.40/328,817.10 = 112,923.20/x
  3. Step 3: Cross multiply
    219,211.40x = 328,817.10 × 112,923.20
  4. Step 4: Simplify right side
    219,211.40x = 37,131,079,146.72
  5. Step 5: Solve for x
    x = 37,131,079,146.72/219,211.40
  6. Step 6: Final answer
    x = 169,384.80

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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.