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Finding the Fourth Proportional to 1,056.89, 1,585.32 and 276.90

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Solution

The fourth proportional to 1,056.89, 1,585.32 and 276.90 is: 415.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,056.89 : 1,585.32 = 276.90 : x
  2. Step 2: Convert to fraction form
    1,056.89/1,585.32 = 276.90/x
  3. Step 3: Cross multiply
    1,056.89x = 1,585.32 × 276.90
  4. Step 4: Simplify right side
    1,056.89x = 438,975.11
  5. Step 5: Solve for x
    x = 438,975.11/1,056.89
  6. Step 6: Final answer
    x = 415.35

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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.