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Finding the Fourth Proportional to 922,276.80, 1,383,415.20 and 257,428.80

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Solution

The fourth proportional to 922,276.80, 1,383,415.20 and 257,428.80 is: 386,143.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,276.80 : 1,383,415.20 = 257,428.80 : x
  2. Step 2: Convert to fraction form
    922,276.80/1,383,415.20 = 257,428.80/x
  3. Step 3: Cross multiply
    922,276.80x = 1,383,415.20 × 257,428.80
  4. Step 4: Simplify right side
    922,276.80x = 356,130,914,837.76
  5. Step 5: Solve for x
    x = 356,130,914,837.76/922,276.80
  6. Step 6: Final answer
    x = 386,143.20

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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.