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Finding the Fourth Proportional to 620,514.84, 930,508.74 and 221,256.12

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Solution

The fourth proportional to 620,514.84, 930,508.74 and 221,256.12 is: 331,790.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,514.84 : 930,508.74 = 221,256.12 : x
  2. Step 2: Convert to fraction form
    620,514.84/930,508.74 = 221,256.12/x
  3. Step 3: Cross multiply
    620,514.84x = 930,508.74 × 221,256.12
  4. Step 4: Simplify right side
    620,514.84x = 205,880,753,438.49
  5. Step 5: Solve for x
    x = 205,880,753,438.49/620,514.84
  6. Step 6: Final answer
    x = 331,790.22

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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.