Home / 921,856.60-1,382,979.30-389,103.40

Finding the Fourth Proportional to 921,856.60, 1,382,979.30 and 389,103.40

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Solution

The fourth proportional to 921,856.60, 1,382,979.30 and 389,103.40 is: 583,737.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,856.60 : 1,382,979.30 = 389,103.40 : x
  2. Step 2: Convert to fraction form
    921,856.60/1,382,979.30 = 389,103.40/x
  3. Step 3: Cross multiply
    921,856.60x = 1,382,979.30 × 389,103.40
  4. Step 4: Simplify right side
    921,856.60x = 538,121,947,759.62
  5. Step 5: Solve for x
    x = 538,121,947,759.62/921,856.60
  6. Step 6: Final answer
    x = 583,737.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.