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Finding the Fourth Proportional to 922,565.64, 1,383,906.72 and 390,016.56

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Solution

The fourth proportional to 922,565.64, 1,383,906.72 and 390,016.56 is: 585,049.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,565.64 : 1,383,906.72 = 390,016.56 : x
  2. Step 2: Convert to fraction form
    922,565.64/1,383,906.72 = 390,016.56/x
  3. Step 3: Cross multiply
    922,565.64x = 1,383,906.72 × 390,016.56
  4. Step 4: Simplify right side
    922,565.64x = 539,746,538,295.28
  5. Step 5: Solve for x
    x = 539,746,538,295.28/922,565.64
  6. Step 6: Final answer
    x = 585,049.47

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1.5x scale

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.