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Finding the Fourth Proportional to 717,364.40, 989,950.81 and 395,104.51

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Solution

The fourth proportional to 717,364.40, 989,950.81 and 395,104.51 is: 545,237.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,364.40 : 989,950.81 = 395,104.51 : x
  2. Step 2: Convert to fraction form
    717,364.40/989,950.81 = 395,104.51/x
  3. Step 3: Cross multiply
    717,364.40x = 989,950.81 × 395,104.51
  4. Step 4: Simplify right side
    717,364.40x = 391,134,022,783.88
  5. Step 5: Solve for x
    x = 391,134,022,783.88/717,364.40
  6. Step 6: Final answer
    x = 545,237.57

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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.