Home / 642,531.66-886,698.90-356,056.56

Finding the Fourth Proportional to 642,531.66, 886,698.90 and 356,056.56

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Solution

The fourth proportional to 642,531.66, 886,698.90 and 356,056.56 is: 491,360.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,531.66 : 886,698.90 = 356,056.56 : x
  2. Step 2: Convert to fraction form
    642,531.66/886,698.90 = 356,056.56/x
  3. Step 3: Cross multiply
    642,531.66x = 886,698.90 × 356,056.56
  4. Step 4: Simplify right side
    642,531.66x = 315,714,960,089.78
  5. Step 5: Solve for x
    x = 315,714,960,089.78/642,531.66
  6. Step 6: Final answer
    x = 491,360.94

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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.