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Finding the Fourth Proportional to 643,249.91, 887,104 and 401,554.91

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Solution

The fourth proportional to 643,249.91, 887,104 and 401,554.91 is: 553,783.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,249.91 : 887,104 = 401,554.91 : x
  2. Step 2: Convert to fraction form
    643,249.91/887,104 = 401,554.91/x
  3. Step 3: Cross multiply
    643,249.91x = 887,104 × 401,554.91
  4. Step 4: Simplify right side
    643,249.91x = 356,220,966,880.64
  5. Step 5: Solve for x
    x = 356,220,966,880.64/643,249.91
  6. Step 6: Final answer
    x = 553,783.16

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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.