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Finding the Fourth Proportional to 643,796.42, 888,602.37 and 439,929.86

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Solution

The fourth proportional to 643,796.42, 888,602.37 and 439,929.86 is: 607,214.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,796.42 : 888,602.37 = 439,929.86 : x
  2. Step 2: Convert to fraction form
    643,796.42/888,602.37 = 439,929.86/x
  3. Step 3: Cross multiply
    643,796.42x = 888,602.37 × 439,929.86
  4. Step 4: Simplify right side
    643,796.42x = 390,922,716,229.77
  5. Step 5: Solve for x
    x = 390,922,716,229.77/643,796.42
  6. Step 6: Final answer
    x = 607,214.80

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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.