Home / 643,584.78-888,153.12-357,131.52

Finding the Fourth Proportional to 643,584.78, 888,153.12 and 357,131.52

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Solution

The fourth proportional to 643,584.78, 888,153.12 and 357,131.52 is: 492,844.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,584.78 : 888,153.12 = 357,131.52 : x
  2. Step 2: Convert to fraction form
    643,584.78/888,153.12 = 357,131.52/x
  3. Step 3: Cross multiply
    643,584.78x = 888,153.12 × 357,131.52
  4. Step 4: Simplify right side
    643,584.78x = 317,187,473,738.34
  5. Step 5: Solve for x
    x = 317,187,473,738.34/643,584.78
  6. Step 6: Final answer
    x = 492,844.90

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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.