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Finding the Fourth Proportional to 922,690.40, 1,384,035.60 and 257,842.40

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Solution

The fourth proportional to 922,690.40, 1,384,035.60 and 257,842.40 is: 386,763.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,690.40 : 1,384,035.60 = 257,842.40 : x
  2. Step 2: Convert to fraction form
    922,690.40/1,384,035.60 = 257,842.40/x
  3. Step 3: Cross multiply
    922,690.40x = 1,384,035.60 × 257,842.40
  4. Step 4: Simplify right side
    922,690.40x = 356,863,060,789.44
  5. Step 5: Solve for x
    x = 356,863,060,789.44/922,690.40
  6. Step 6: Final answer
    x = 386,763.60

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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.