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Finding the Fourth Proportional to 660,027.49, 990,457.71 and 280,947.62

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Solution

The fourth proportional to 660,027.49, 990,457.71 and 280,947.62 is: 421,598.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,027.49 : 990,457.71 = 280,947.62 : x
  2. Step 2: Convert to fraction form
    660,027.49/990,457.71 = 280,947.62/x
  3. Step 3: Cross multiply
    660,027.49x = 990,457.71 × 280,947.62
  4. Step 4: Simplify right side
    660,027.49x = 278,266,736,335.15
  5. Step 5: Solve for x
    x = 278,266,736,335.15/660,027.49
  6. Step 6: Final answer
    x = 421,598.71

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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.