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Finding the Fourth Proportional to 717,085.08, 989,569.44 and 394,788.51

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Solution

The fourth proportional to 717,085.08, 989,569.44 and 394,788.51 is: 544,803.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,085.08 : 989,569.44 = 394,788.51 : x
  2. Step 2: Convert to fraction form
    717,085.08/989,569.44 = 394,788.51/x
  3. Step 3: Cross multiply
    717,085.08x = 989,569.44 × 394,788.51
  4. Step 4: Simplify right side
    717,085.08x = 390,670,644,759.13
  5. Step 5: Solve for x
    x = 390,670,644,759.13/717,085.08
  6. Step 6: Final answer
    x = 544,803.76

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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.