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Finding the Fourth Proportional to 921,109.30, 1,375,187.22 and 703,830.90

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Solution

The fourth proportional to 921,109.30, 1,375,187.22 and 703,830.90 is: 1,050,797.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,109.30 : 1,375,187.22 = 703,830.90 : x
  2. Step 2: Convert to fraction form
    921,109.30/1,375,187.22 = 703,830.90/x
  3. Step 3: Cross multiply
    921,109.30x = 1,375,187.22 × 703,830.90
  4. Step 4: Simplify right side
    921,109.30x = 967,899,258,721.10
  5. Step 5: Solve for x
    x = 967,899,258,721.10/921,109.30
  6. Step 6: Final answer
    x = 1,050,797.40

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.