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Finding the Fourth Proportional to 643,571.51, 888,148.70 and 357,118.25

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Solution

The fourth proportional to 643,571.51, 888,148.70 and 357,118.25 is: 492,834.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,571.51 : 888,148.70 = 357,118.25 : x
  2. Step 2: Convert to fraction form
    643,571.51/888,148.70 = 357,118.25/x
  3. Step 3: Cross multiply
    643,571.51x = 888,148.70 × 357,118.25
  4. Step 4: Simplify right side
    643,571.51x = 317,174,103,257.44
  5. Step 5: Solve for x
    x = 317,174,103,257.44/643,571.51
  6. Step 6: Final answer
    x = 492,834.29

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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.