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Finding the Fourth Proportional to 783.25, 1,174.91 and 436.32

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Solution

The fourth proportional to 783.25, 1,174.91 and 436.32 is: 654.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.25 : 1,174.91 = 436.32 : x
  2. Step 2: Convert to fraction form
    783.25/1,174.91 = 436.32/x
  3. Step 3: Cross multiply
    783.25x = 1,174.91 × 436.32
  4. Step 4: Simplify right side
    783.25x = 512,636.73
  5. Step 5: Solve for x
    x = 512,636.73/783.25
  6. Step 6: Final answer
    x = 654.50

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Double scale
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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.