Home / 990,624.60-1,485,936.90-280,643.40

Finding the Fourth Proportional to 990,624.60, 1,485,936.90 and 280,643.40

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Solution

The fourth proportional to 990,624.60, 1,485,936.90 and 280,643.40 is: 420,965.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,624.60 : 1,485,936.90 = 280,643.40 : x
  2. Step 2: Convert to fraction form
    990,624.60/1,485,936.90 = 280,643.40/x
  3. Step 3: Cross multiply
    990,624.60x = 1,485,936.90 × 280,643.40
  4. Step 4: Simplify right side
    990,624.60x = 417,018,383,801.46
  5. Step 5: Solve for x
    x = 417,018,383,801.46/990,624.60
  6. Step 6: Final answer
    x = 420,965.10

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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.