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Finding the Fourth Proportional to 1,267,928.12, 1,749,920.19 and 784,648.91

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Solution

The fourth proportional to 1,267,928.12, 1,749,920.19 and 784,648.91 is: 1,082,926.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267,928.12 : 1,749,920.19 = 784,648.91 : x
  2. Step 2: Convert to fraction form
    1,267,928.12/1,749,920.19 = 784,648.91/x
  3. Step 3: Cross multiply
    1,267,928.12x = 1,749,920.19 × 784,648.91
  4. Step 4: Simplify right side
    1,267,928.12x = 1,373,072,969,670.49
  5. Step 5: Solve for x
    x = 1,373,072,969,670.49/1,267,928.12
  6. Step 6: Final answer
    x = 1,082,926.51

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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.