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Finding the Fourth Proportional to 883.47, 1,325.55 and 421.46

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Solution

The fourth proportional to 883.47, 1,325.55 and 421.46 is: 632.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.47 : 1,325.55 = 421.46 : x
  2. Step 2: Convert to fraction form
    883.47/1,325.55 = 421.46/x
  3. Step 3: Cross multiply
    883.47x = 1,325.55 × 421.46
  4. Step 4: Simplify right side
    883.47x = 558,659.68
  5. Step 5: Solve for x
    x = 558,659.68/883.47
  6. Step 6: Final answer
    x = 632.35

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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.