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Finding the Fourth Proportional to 694,053.60, 957,788.55 and 388,130.57

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Solution

The fourth proportional to 694,053.60, 957,788.55 and 388,130.57 is: 535,617.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    694,053.60 : 957,788.55 = 388,130.57 : x
  2. Step 2: Convert to fraction form
    694,053.60/957,788.55 = 388,130.57/x
  3. Step 3: Cross multiply
    694,053.60x = 957,788.55 × 388,130.57
  4. Step 4: Simplify right side
    694,053.60x = 371,747,014,653.74
  5. Step 5: Solve for x
    x = 371,747,014,653.74/694,053.60
  6. Step 6: Final answer
    x = 535,617.16

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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.