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Finding the Fourth Proportional to 420,358.80, 631,121.40 and 262,894.80

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Solution

The fourth proportional to 420,358.80, 631,121.40 and 262,894.80 is: 394,706.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,358.80 : 631,121.40 = 262,894.80 : x
  2. Step 2: Convert to fraction form
    420,358.80/631,121.40 = 262,894.80/x
  3. Step 3: Cross multiply
    420,358.80x = 631,121.40 × 262,894.80
  4. Step 4: Simplify right side
    420,358.80x = 165,918,534,228.72
  5. Step 5: Solve for x
    x = 165,918,534,228.72/420,358.80
  6. Step 6: Final answer
    x = 394,706.94

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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.