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Finding the Fourth Proportional to 386,078.20, 579,030.90 and 253,886.20

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Solution

The fourth proportional to 386,078.20, 579,030.90 and 253,886.20 is: 380,772.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,078.20 : 579,030.90 = 253,886.20 : x
  2. Step 2: Convert to fraction form
    386,078.20/579,030.90 = 253,886.20/x
  3. Step 3: Cross multiply
    386,078.20x = 579,030.90 × 253,886.20
  4. Step 4: Simplify right side
    386,078.20x = 147,007,954,883.58
  5. Step 5: Solve for x
    x = 147,007,954,883.58/386,078.20
  6. Step 6: Final answer
    x = 380,772.48

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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.