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Finding the Fourth Proportional to 211,990.40, 317,402.40 and 201,492.80

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Solution

The fourth proportional to 211,990.40, 317,402.40 and 201,492.80 is: 301,684.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,990.40 : 317,402.40 = 201,492.80 : x
  2. Step 2: Convert to fraction form
    211,990.40/317,402.40 = 201,492.80/x
  3. Step 3: Cross multiply
    211,990.40x = 317,402.40 × 201,492.80
  4. Step 4: Simplify right side
    211,990.40x = 63,954,298,302.72
  5. Step 5: Solve for x
    x = 63,954,298,302.72/211,990.40
  6. Step 6: Final answer
    x = 301,684.88

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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.