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Finding the Fourth Proportional to 431,809.40, 647,519.70 and 195,030.20

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Solution

The fourth proportional to 431,809.40, 647,519.70 and 195,030.20 is: 292,457.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,809.40 : 647,519.70 = 195,030.20 : x
  2. Step 2: Convert to fraction form
    431,809.40/647,519.70 = 195,030.20/x
  3. Step 3: Cross multiply
    431,809.40x = 647,519.70 × 195,030.20
  4. Step 4: Simplify right side
    431,809.40x = 126,285,896,594.94
  5. Step 5: Solve for x
    x = 126,285,896,594.94/431,809.40
  6. Step 6: Final answer
    x = 292,457.50

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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.