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Finding the Fourth Proportional to 868.51, 1,302.81 and 435.25

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Solution

The fourth proportional to 868.51, 1,302.81 and 435.25 is: 652.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.51 : 1,302.81 = 435.25 : x
  2. Step 2: Convert to fraction form
    868.51/1,302.81 = 435.25/x
  3. Step 3: Cross multiply
    868.51x = 1,302.81 × 435.25
  4. Step 4: Simplify right side
    868.51x = 567,048.05
  5. Step 5: Solve for x
    x = 567,048.05/868.51
  6. Step 6: Final answer
    x = 652.90

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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.