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Finding the Fourth Proportional to 810,138.75, 1,117,978.25 and 447,577.89

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Solution

The fourth proportional to 810,138.75, 1,117,978.25 and 447,577.89 is: 617,650.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,138.75 : 1,117,978.25 = 447,577.89 : x
  2. Step 2: Convert to fraction form
    810,138.75/1,117,978.25 = 447,577.89/x
  3. Step 3: Cross multiply
    810,138.75x = 1,117,978.25 × 447,577.89
  4. Step 4: Simplify right side
    810,138.75x = 500,382,343,963.00
  5. Step 5: Solve for x
    x = 500,382,343,963.00/810,138.75
  6. Step 6: Final answer
    x = 617,650.18

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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.