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Finding the Fourth Proportional to 643,458.93, 887,943.72 and 353,064.12

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Solution

The fourth proportional to 643,458.93, 887,943.72 and 353,064.12 is: 487,212.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,458.93 : 887,943.72 = 353,064.12 : x
  2. Step 2: Convert to fraction form
    643,458.93/887,943.72 = 353,064.12/x
  3. Step 3: Cross multiply
    643,458.93x = 887,943.72 × 353,064.12
  4. Step 4: Simplify right side
    643,458.93x = 313,501,068,111.33
  5. Step 5: Solve for x
    x = 313,501,068,111.33/643,458.93
  6. Step 6: Final answer
    x = 487,212.24

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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.