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Finding the Fourth Proportional to 915.89, 1,263.75 and 584.06

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Solution

The fourth proportional to 915.89, 1,263.75 and 584.06 is: 805.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.89 : 1,263.75 = 584.06 : x
  2. Step 2: Convert to fraction form
    915.89/1,263.75 = 584.06/x
  3. Step 3: Cross multiply
    915.89x = 1,263.75 × 584.06
  4. Step 4: Simplify right side
    915.89x = 738,105.83
  5. Step 5: Solve for x
    x = 738,105.83/915.89
  6. Step 6: Final answer
    x = 805.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.