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Finding the Fourth Proportional to 318,496.35, 439,706.25 and 211,211.22

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Solution

The fourth proportional to 318,496.35, 439,706.25 and 211,211.22 is: 291,591.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,496.35 : 439,706.25 = 211,211.22 : x
  2. Step 2: Convert to fraction form
    318,496.35/439,706.25 = 211,211.22/x
  3. Step 3: Cross multiply
    318,496.35x = 439,706.25 × 211,211.22
  4. Step 4: Simplify right side
    318,496.35x = 92,870,893,504.13
  5. Step 5: Solve for x
    x = 92,870,893,504.13/318,496.35
  6. Step 6: Final answer
    x = 291,591.70

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1.5x scale

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.