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Finding the Fourth Proportional to 922,937.20, 1,288,962.80 and 922,937.20

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Solution

The fourth proportional to 922,937.20, 1,288,962.80 and 922,937.20 is: 1,288,962.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,937.20 : 1,288,962.80 = 922,937.20 : x
  2. Step 2: Convert to fraction form
    922,937.20/1,288,962.80 = 922,937.20/x
  3. Step 3: Cross multiply
    922,937.20x = 1,288,962.80 × 922,937.20
  4. Step 4: Simplify right side
    922,937.20x = 1,189,631,717,536.16
  5. Step 5: Solve for x
    x = 1,189,631,717,536.16/922,937.20
  6. Step 6: Final answer
    x = 1,288,962.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.