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Finding the Fourth Proportional to 1,036.90, 1,556.36 and 489.46

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Solution

The fourth proportional to 1,036.90, 1,556.36 and 489.46 is: 734.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.90 : 1,556.36 = 489.46 : x
  2. Step 2: Convert to fraction form
    1,036.90/1,556.36 = 489.46/x
  3. Step 3: Cross multiply
    1,036.90x = 1,556.36 × 489.46
  4. Step 4: Simplify right side
    1,036.90x = 761,773.52
  5. Step 5: Solve for x
    x = 761,773.52/1,036.90
  6. Step 6: Final answer
    x = 734.66

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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.