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Finding the Fourth Proportional to 2,915.76, 4,374.36 and 835.93

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Solution

The fourth proportional to 2,915.76, 4,374.36 and 835.93 is: 1,254.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,915.76 : 4,374.36 = 835.93 : x
  2. Step 2: Convert to fraction form
    2,915.76/4,374.36 = 835.93/x
  3. Step 3: Cross multiply
    2,915.76x = 4,374.36 × 835.93
  4. Step 4: Simplify right side
    2,915.76x = 3,656,658.75
  5. Step 5: Solve for x
    x = 3,656,658.75/2,915.76
  6. Step 6: Final answer
    x = 1,254.10

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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.