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Finding the Fourth Proportional to 693,637.83, 957,108.96 and 421,560.45

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Solution

The fourth proportional to 693,637.83, 957,108.96 and 421,560.45 is: 581,685.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,637.83 : 957,108.96 = 421,560.45 : x
  2. Step 2: Convert to fraction form
    693,637.83/957,108.96 = 421,560.45/x
  3. Step 3: Cross multiply
    693,637.83x = 957,108.96 × 421,560.45
  4. Step 4: Simplify right side
    693,637.83x = 403,479,283,876.63
  5. Step 5: Solve for x
    x = 403,479,283,876.63/693,637.83
  6. Step 6: Final answer
    x = 581,685.81

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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.