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Finding the Fourth Proportional to 642,080.80, 962,894.40 and 221,258.80

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Solution

The fourth proportional to 642,080.80, 962,894.40 and 221,258.80 is: 331,810.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,080.80 : 962,894.40 = 221,258.80 : x
  2. Step 2: Convert to fraction form
    642,080.80/962,894.40 = 221,258.80/x
  3. Step 3: Cross multiply
    642,080.80x = 962,894.40 × 221,258.80
  4. Step 4: Simplify right side
    642,080.80x = 213,048,859,470.72
  5. Step 5: Solve for x
    x = 213,048,859,470.72/642,080.80
  6. Step 6: Final answer
    x = 331,810.05

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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.