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Finding the Fourth Proportional to 2,955, 4,433.40 and 874.92

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Solution

The fourth proportional to 2,955, 4,433.40 and 874.92 is: 1,312.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,955 : 4,433.40 = 874.92 : x
  2. Step 2: Convert to fraction form
    2,955/4,433.40 = 874.92/x
  3. Step 3: Cross multiply
    2,955x = 4,433.40 × 874.92
  4. Step 4: Simplify right side
    2,955x = 3,878,870.33
  5. Step 5: Solve for x
    x = 3,878,870.33/2,955
  6. Step 6: Final answer
    x = 1,312.65

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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.