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Finding the Fourth Proportional to 218,857.80, 328,545.90 and 217,302.60

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Solution

The fourth proportional to 218,857.80, 328,545.90 and 217,302.60 is: 326,211.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,857.80 : 328,545.90 = 217,302.60 : x
  2. Step 2: Convert to fraction form
    218,857.80/328,545.90 = 217,302.60/x
  3. Step 3: Cross multiply
    218,857.80x = 328,545.90 × 217,302.60
  4. Step 4: Simplify right side
    218,857.80x = 71,393,878,289.34
  5. Step 5: Solve for x
    x = 71,393,878,289.34/218,857.80
  6. Step 6: Final answer
    x = 326,211.26

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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.