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Finding the Fourth Proportional to 1,148.56, 1,585 and 624.59

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Solution

The fourth proportional to 1,148.56, 1,585 and 624.59 is: 861.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,148.56 : 1,585 = 624.59 : x
  2. Step 2: Convert to fraction form
    1,148.56/1,585 = 624.59/x
  3. Step 3: Cross multiply
    1,148.56x = 1,585 × 624.59
  4. Step 4: Simplify right side
    1,148.56x = 989,975.15
  5. Step 5: Solve for x
    x = 989,975.15/1,148.56
  6. Step 6: Final answer
    x = 861.93

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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.