Home / 643,899.60-888,584.94-402,322.35

Finding the Fourth Proportional to 643,899.60, 888,584.94 and 402,322.35

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Solution

The fourth proportional to 643,899.60, 888,584.94 and 402,322.35 is: 555,207.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,899.60 : 888,584.94 = 402,322.35 : x
  2. Step 2: Convert to fraction form
    643,899.60/888,584.94 = 402,322.35/x
  3. Step 3: Cross multiply
    643,899.60x = 888,584.94 × 402,322.35
  4. Step 4: Simplify right side
    643,899.60x = 357,497,581,235.41
  5. Step 5: Solve for x
    x = 357,497,581,235.41/643,899.60
  6. Step 6: Final answer
    x = 555,207.02

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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.