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Finding the Fourth Proportional to 643,799.70, 888,485.10 and 357,319.80

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Solution

The fourth proportional to 643,799.70, 888,485.10 and 357,319.80 is: 493,124.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,799.70 : 888,485.10 = 357,319.80 : x
  2. Step 2: Convert to fraction form
    643,799.70/888,485.10 = 357,319.80/x
  3. Step 3: Cross multiply
    643,799.70x = 888,485.10 × 357,319.80
  4. Step 4: Simplify right side
    643,799.70x = 317,473,318,234.98
  5. Step 5: Solve for x
    x = 317,473,318,234.98/643,799.70
  6. Step 6: Final answer
    x = 493,124.36

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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.