Home / 643,457.20-887,971.35-356,977.57

Finding the Fourth Proportional to 643,457.20, 887,971.35 and 356,977.57

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Solution

The fourth proportional to 643,457.20, 887,971.35 and 356,977.57 is: 492,629.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,457.20 : 887,971.35 = 356,977.57 : x
  2. Step 2: Convert to fraction form
    643,457.20/887,971.35 = 356,977.57/x
  3. Step 3: Cross multiply
    643,457.20x = 887,971.35 × 356,977.57
  4. Step 4: Simplify right side
    643,457.20x = 316,985,854,752.62
  5. Step 5: Solve for x
    x = 316,985,854,752.62/643,457.20
  6. Step 6: Final answer
    x = 492,629.28

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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.