Home / 643,895.56-888,579.30-402,318.22

Finding the Fourth Proportional to 643,895.56, 888,579.30 and 402,318.22

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Solution

The fourth proportional to 643,895.56, 888,579.30 and 402,318.22 is: 555,201.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,895.56 : 888,579.30 = 402,318.22 : x
  2. Step 2: Convert to fraction form
    643,895.56/888,579.30 = 402,318.22/x
  3. Step 3: Cross multiply
    643,895.56x = 888,579.30 × 402,318.22
  4. Step 4: Simplify right side
    643,895.56x = 357,491,642,304.85
  5. Step 5: Solve for x
    x = 357,491,642,304.85/643,895.56
  6. Step 6: Final answer
    x = 555,201.28

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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.