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Finding the Fourth Proportional to 289,485.48, 434,255.74 and 89,808.04

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Solution

The fourth proportional to 289,485.48, 434,255.74 and 89,808.04 is: 134,720.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,485.48 : 434,255.74 = 89,808.04 : x
  2. Step 2: Convert to fraction form
    289,485.48/434,255.74 = 89,808.04/x
  3. Step 3: Cross multiply
    289,485.48x = 434,255.74 × 89,808.04
  4. Step 4: Simplify right side
    289,485.48x = 38,999,656,868.15
  5. Step 5: Solve for x
    x = 38,999,656,868.15/289,485.48
  6. Step 6: Final answer
    x = 134,720.60

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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.