Home / 1,355.18-2,032.78-489.50

Finding the Fourth Proportional to 1,355.18, 2,032.78 and 489.50

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Solution

The fourth proportional to 1,355.18, 2,032.78 and 489.50 is: 734.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.18 : 2,032.78 = 489.50 : x
  2. Step 2: Convert to fraction form
    1,355.18/2,032.78 = 489.50/x
  3. Step 3: Cross multiply
    1,355.18x = 2,032.78 × 489.50
  4. Step 4: Simplify right side
    1,355.18x = 995,045.81
  5. Step 5: Solve for x
    x = 995,045.81/1,355.18
  6. Step 6: Final answer
    x = 734.25

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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.