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Finding the Fourth Proportional to 956.19, 1,434.59 and 436.17

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Solution

The fourth proportional to 956.19, 1,434.59 and 436.17 is: 654.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.19 : 1,434.59 = 436.17 : x
  2. Step 2: Convert to fraction form
    956.19/1,434.59 = 436.17/x
  3. Step 3: Cross multiply
    956.19x = 1,434.59 × 436.17
  4. Step 4: Simplify right side
    956.19x = 625,725.12
  5. Step 5: Solve for x
    x = 625,725.12/956.19
  6. Step 6: Final answer
    x = 654.39

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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.