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Finding the Fourth Proportional to 660,018.06, 990,443.58 and 280,938.18

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Solution

The fourth proportional to 660,018.06, 990,443.58 and 280,938.18 is: 421,584.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,018.06 : 990,443.58 = 280,938.18 : x
  2. Step 2: Convert to fraction form
    660,018.06/990,443.58 = 280,938.18/x
  3. Step 3: Cross multiply
    660,018.06x = 990,443.58 × 280,938.18
  4. Step 4: Simplify right side
    660,018.06x = 278,253,416,757.88
  5. Step 5: Solve for x
    x = 278,253,416,757.88/660,018.06
  6. Step 6: Final answer
    x = 421,584.55

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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.