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Finding the Fourth Proportional to 643,836.60, 888,495.48 and 357,349.32

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Solution

The fourth proportional to 643,836.60, 888,495.48 and 357,349.32 is: 493,142.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,836.60 : 888,495.48 = 357,349.32 : x
  2. Step 2: Convert to fraction form
    643,836.60/888,495.48 = 357,349.32/x
  3. Step 3: Cross multiply
    643,836.60x = 888,495.48 × 357,349.32
  4. Step 4: Simplify right side
    643,836.60x = 317,503,255,601.07
  5. Step 5: Solve for x
    x = 317,503,255,601.07/643,836.60
  6. Step 6: Final answer
    x = 493,142.60

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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.