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Finding the Fourth Proportional to 955.98, 1,435.86 and 916.56

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Solution

The fourth proportional to 955.98, 1,435.86 and 916.56 is: 1,376.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.98 : 1,435.86 = 916.56 : x
  2. Step 2: Convert to fraction form
    955.98/1,435.86 = 916.56/x
  3. Step 3: Cross multiply
    955.98x = 1,435.86 × 916.56
  4. Step 4: Simplify right side
    955.98x = 1,316,051.84
  5. Step 5: Solve for x
    x = 1,316,051.84/955.98
  6. Step 6: Final answer
    x = 1,376.65

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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.