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Finding the Fourth Proportional to 643,963.50, 888,625.10 and 357,461.03

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Solution

The fourth proportional to 643,963.50, 888,625.10 and 357,461.03 is: 493,271.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,963.50 : 888,625.10 = 357,461.03 : x
  2. Step 2: Convert to fraction form
    643,963.50/888,625.10 = 357,461.03/x
  3. Step 3: Cross multiply
    643,963.50x = 888,625.10 × 357,461.03
  4. Step 4: Simplify right side
    643,963.50x = 317,648,846,645.07
  5. Step 5: Solve for x
    x = 317,648,846,645.07/643,963.50
  6. Step 6: Final answer
    x = 493,271.51

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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.