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Finding the Fourth Proportional to 561.16, 840.03 and 489.16

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Solution

The fourth proportional to 561.16, 840.03 and 489.16 is: 732.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.16 : 840.03 = 489.16 : x
  2. Step 2: Convert to fraction form
    561.16/840.03 = 489.16/x
  3. Step 3: Cross multiply
    561.16x = 840.03 × 489.16
  4. Step 4: Simplify right side
    561.16x = 410,905.14
  5. Step 5: Solve for x
    x = 410,905.14/561.16
  6. Step 6: Final answer
    x = 732.25

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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.