Home / 643,465.85-887,982.53-353,079.32

Finding the Fourth Proportional to 643,465.85, 887,982.53 and 353,079.32

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Solution

The fourth proportional to 643,465.85, 887,982.53 and 353,079.32 is: 487,249.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,465.85 : 887,982.53 = 353,079.32 : x
  2. Step 2: Convert to fraction form
    643,465.85/887,982.53 = 353,079.32/x
  3. Step 3: Cross multiply
    643,465.85x = 887,982.53 × 353,079.32
  4. Step 4: Simplify right side
    643,465.85x = 313,528,268,318.84
  5. Step 5: Solve for x
    x = 313,528,268,318.84/643,465.85
  6. Step 6: Final answer
    x = 487,249.28

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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.