Home / 643,023.32-887,290.62-352,558.45

Finding the Fourth Proportional to 643,023.32, 887,290.62 and 352,558.45

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Solution

The fourth proportional to 643,023.32, 887,290.62 and 352,558.45 is: 486,485.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,023.32 : 887,290.62 = 352,558.45 : x
  2. Step 2: Convert to fraction form
    643,023.32/887,290.62 = 352,558.45/x
  3. Step 3: Cross multiply
    643,023.32x = 887,290.62 × 352,558.45
  4. Step 4: Simplify right side
    643,023.32x = 312,821,808,448.47
  5. Step 5: Solve for x
    x = 312,821,808,448.47/643,023.32
  6. Step 6: Final answer
    x = 486,485.94

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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.