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Finding the Fourth Proportional to 656,154.36, 905,493 and 354,348.36

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Solution

The fourth proportional to 656,154.36, 905,493 and 354,348.36 is: 489,000.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,154.36 : 905,493 = 354,348.36 : x
  2. Step 2: Convert to fraction form
    656,154.36/905,493 = 354,348.36/x
  3. Step 3: Cross multiply
    656,154.36x = 905,493 × 354,348.36
  4. Step 4: Simplify right side
    656,154.36x = 320,859,959,541.48
  5. Step 5: Solve for x
    x = 320,859,959,541.48/656,154.36
  6. Step 6: Final answer
    x = 489,000.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.