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Finding the Fourth Proportional to 643,496.68, 888,013.60 and 357,010.62

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Solution

The fourth proportional to 643,496.68, 888,013.60 and 357,010.62 is: 492,668.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,496.68 : 888,013.60 = 357,010.62 : x
  2. Step 2: Convert to fraction form
    643,496.68/888,013.60 = 357,010.62/x
  3. Step 3: Cross multiply
    643,496.68x = 888,013.60 × 357,010.62
  4. Step 4: Simplify right side
    643,496.68x = 317,030,285,904.43
  5. Step 5: Solve for x
    x = 317,030,285,904.43/643,496.68
  6. Step 6: Final answer
    x = 492,668.10

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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.