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Finding the Fourth Proportional to 948.59, 1,422.81 and 435.59

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Solution

The fourth proportional to 948.59, 1,422.81 and 435.59 is: 653.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.59 : 1,422.81 = 435.59 : x
  2. Step 2: Convert to fraction form
    948.59/1,422.81 = 435.59/x
  3. Step 3: Cross multiply
    948.59x = 1,422.81 × 435.59
  4. Step 4: Simplify right side
    948.59x = 619,759.63
  5. Step 5: Solve for x
    x = 619,759.63/948.59
  6. Step 6: Final answer
    x = 653.35

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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.