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Finding the Fourth Proportional to 634,005.09, 874,416.86 and 557,360.31

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Solution

The fourth proportional to 634,005.09, 874,416.86 and 557,360.31 is: 768,708.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    634,005.09 : 874,416.86 = 557,360.31 : x
  2. Step 2: Convert to fraction form
    634,005.09/874,416.86 = 557,360.31/x
  3. Step 3: Cross multiply
    634,005.09x = 874,416.86 × 557,360.31
  4. Step 4: Simplify right side
    634,005.09x = 487,365,248,930.87
  5. Step 5: Solve for x
    x = 487,365,248,930.87/634,005.09
  6. Step 6: Final answer
    x = 768,708.74

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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.