Home / 643,884.42-888,380.46-402,412.29

Finding the Fourth Proportional to 643,884.42, 888,380.46 and 402,412.29

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Solution

The fourth proportional to 643,884.42, 888,380.46 and 402,412.29 is: 555,216.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,884.42 : 888,380.46 = 402,412.29 : x
  2. Step 2: Convert to fraction form
    643,884.42/888,380.46 = 402,412.29/x
  3. Step 3: Cross multiply
    643,884.42x = 888,380.46 × 402,412.29
  4. Step 4: Simplify right side
    643,884.42x = 357,495,211,968.43
  5. Step 5: Solve for x
    x = 357,495,211,968.43/643,884.42
  6. Step 6: Final answer
    x = 555,216.43

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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.