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Finding the Fourth Proportional to 643,841.10, 888,579.45 and 357,453.45

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Solution

The fourth proportional to 643,841.10, 888,579.45 and 357,453.45 is: 493,329.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,841.10 : 888,579.45 = 357,453.45 : x
  2. Step 2: Convert to fraction form
    643,841.10/888,579.45 = 357,453.45/x
  3. Step 3: Cross multiply
    643,841.10x = 888,579.45 × 357,453.45
  4. Step 4: Simplify right side
    643,841.10x = 317,625,790,001.60
  5. Step 5: Solve for x
    x = 317,625,790,001.60/643,841.10
  6. Step 6: Final answer
    x = 493,329.47

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1.5x scale

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.