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Finding the Fourth Proportional to 289,620.40, 434,430.60 and 268,625.20

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Solution

The fourth proportional to 289,620.40, 434,430.60 and 268,625.20 is: 402,937.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,620.40 : 434,430.60 = 268,625.20 : x
  2. Step 2: Convert to fraction form
    289,620.40/434,430.60 = 268,625.20/x
  3. Step 3: Cross multiply
    289,620.40x = 434,430.60 × 268,625.20
  4. Step 4: Simplify right side
    289,620.40x = 116,699,006,811.12
  5. Step 5: Solve for x
    x = 116,699,006,811.12/289,620.40
  6. Step 6: Final answer
    x = 402,937.80

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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.