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Finding the Fourth Proportional to 907,872, 1,252,872 and 505,472.64

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Solution

The fourth proportional to 907,872, 1,252,872 and 505,472.64 is: 697,557.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    907,872 : 1,252,872 = 505,472.64 : x
  2. Step 2: Convert to fraction form
    907,872/1,252,872 = 505,472.64/x
  3. Step 3: Cross multiply
    907,872x = 1,252,872 × 505,472.64
  4. Step 4: Simplify right side
    907,872x = 633,292,517,422.08
  5. Step 5: Solve for x
    x = 633,292,517,422.08/907,872
  6. Step 6: Final answer
    x = 697,557.05

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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.