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Finding the Fourth Proportional to 922,713.36, 1,384,616.60 and 390,205.20

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Solution

The fourth proportional to 922,713.36, 1,384,616.60 and 390,205.20 is: 585,538.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,713.36 : 1,384,616.60 = 390,205.20 : x
  2. Step 2: Convert to fraction form
    922,713.36/1,384,616.60 = 390,205.20/x
  3. Step 3: Cross multiply
    922,713.36x = 1,384,616.60 × 390,205.20
  4. Step 4: Simplify right side
    922,713.36x = 540,284,597,326.32
  5. Step 5: Solve for x
    x = 540,284,597,326.32/922,713.36
  6. Step 6: Final answer
    x = 585,538.93

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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.