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Finding the Fourth Proportional to 899.38, 1,240.95 and 605.35

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Solution

The fourth proportional to 899.38, 1,240.95 and 605.35 is: 835.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.38 : 1,240.95 = 605.35 : x
  2. Step 2: Convert to fraction form
    899.38/1,240.95 = 605.35/x
  3. Step 3: Cross multiply
    899.38x = 1,240.95 × 605.35
  4. Step 4: Simplify right side
    899.38x = 751,209.08
  5. Step 5: Solve for x
    x = 751,209.08/899.38
  6. Step 6: Final answer
    x = 835.25

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Double scale
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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.