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Finding the Fourth Proportional to 660,812.80, 990,563.10 and 305,206.60

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Solution

The fourth proportional to 660,812.80, 990,563.10 and 305,206.60 is: 457,506.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,812.80 : 990,563.10 = 305,206.60 : x
  2. Step 2: Convert to fraction form
    660,812.80/990,563.10 = 305,206.60/x
  3. Step 3: Cross multiply
    660,812.80x = 990,563.10 × 305,206.60
  4. Step 4: Simplify right side
    660,812.80x = 302,326,395,836.46
  5. Step 5: Solve for x
    x = 302,326,395,836.46/660,812.80
  6. Step 6: Final answer
    x = 457,506.87

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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.