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Finding the Fourth Proportional to 290,492.40, 435,738.60 and 172,102.80

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Solution

The fourth proportional to 290,492.40, 435,738.60 and 172,102.80 is: 258,154.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,492.40 : 435,738.60 = 172,102.80 : x
  2. Step 2: Convert to fraction form
    290,492.40/435,738.60 = 172,102.80/x
  3. Step 3: Cross multiply
    290,492.40x = 435,738.60 × 172,102.80
  4. Step 4: Simplify right side
    290,492.40x = 74,991,833,128.08
  5. Step 5: Solve for x
    x = 74,991,833,128.08/290,492.40
  6. Step 6: Final answer
    x = 258,154.20

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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.