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Finding the Fourth Proportional to 883.75, 1,325.36 and 421.07

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Solution

The fourth proportional to 883.75, 1,325.36 and 421.07 is: 631.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.75 : 1,325.36 = 421.07 : x
  2. Step 2: Convert to fraction form
    883.75/1,325.36 = 421.07/x
  3. Step 3: Cross multiply
    883.75x = 1,325.36 × 421.07
  4. Step 4: Simplify right side
    883.75x = 558,069.34
  5. Step 5: Solve for x
    x = 558,069.34/883.75
  6. Step 6: Final answer
    x = 631.48

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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.