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Finding the Fourth Proportional to 899.06, 1,240.71 and 506.09

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Solution

The fourth proportional to 899.06, 1,240.71 and 506.09 is: 698.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.06 : 1,240.71 = 506.09 : x
  2. Step 2: Convert to fraction form
    899.06/1,240.71 = 506.09/x
  3. Step 3: Cross multiply
    899.06x = 1,240.71 × 506.09
  4. Step 4: Simplify right side
    899.06x = 627,907.48
  5. Step 5: Solve for x
    x = 627,907.48/899.06
  6. Step 6: Final answer
    x = 698.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.