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Finding the Fourth Proportional to 768,717.60, 1,153,076.40 and 756,907.80

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Solution

The fourth proportional to 768,717.60, 1,153,076.40 and 756,907.80 is: 1,135,361.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,717.60 : 1,153,076.40 = 756,907.80 : x
  2. Step 2: Convert to fraction form
    768,717.60/1,153,076.40 = 756,907.80/x
  3. Step 3: Cross multiply
    768,717.60x = 1,153,076.40 × 756,907.80
  4. Step 4: Simplify right side
    768,717.60x = 872,772,521,155.92
  5. Step 5: Solve for x
    x = 872,772,521,155.92/768,717.60
  6. Step 6: Final answer
    x = 1,135,361.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.