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Finding the Fourth Proportional to 1,018,768.94, 1,525,631.07 and 748,255.58

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Solution

The fourth proportional to 1,018,768.94, 1,525,631.07 and 748,255.58 is: 1,120,530.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,018,768.94 : 1,525,631.07 = 748,255.58 : x
  2. Step 2: Convert to fraction form
    1,018,768.94/1,525,631.07 = 748,255.58/x
  3. Step 3: Cross multiply
    1,018,768.94x = 1,525,631.07 × 748,255.58
  4. Step 4: Simplify right side
    1,018,768.94x = 1,141,561,962,129.69
  5. Step 5: Solve for x
    x = 1,141,561,962,129.69/1,018,768.94
  6. Step 6: Final answer
    x = 1,120,530.78

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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.