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Finding the Fourth Proportional to 864,768.88, 1,297,950.70 and 438,603.80

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Solution

The fourth proportional to 864,768.88, 1,297,950.70 and 438,603.80 is: 658,310.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    864,768.88 : 1,297,950.70 = 438,603.80 : x
  2. Step 2: Convert to fraction form
    864,768.88/1,297,950.70 = 438,603.80/x
  3. Step 3: Cross multiply
    864,768.88x = 1,297,950.70 × 438,603.80
  4. Step 4: Simplify right side
    864,768.88x = 569,286,109,232.66
  5. Step 5: Solve for x
    x = 569,286,109,232.66/864,768.88
  6. Step 6: Final answer
    x = 658,310.12

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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.