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Finding the Fourth Proportional to 956.45, 1,435.12 and 436.61

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Solution

The fourth proportional to 956.45, 1,435.12 and 436.61 is: 655.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.45 : 1,435.12 = 436.61 : x
  2. Step 2: Convert to fraction form
    956.45/1,435.12 = 436.61/x
  3. Step 3: Cross multiply
    956.45x = 1,435.12 × 436.61
  4. Step 4: Simplify right side
    956.45x = 626,590.24
  5. Step 5: Solve for x
    x = 626,590.24/956.45
  6. Step 6: Final answer
    x = 655.12

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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.