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Finding the Fourth Proportional to 289,699.80, 434,549.70 and 261,706.20

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Solution

The fourth proportional to 289,699.80, 434,549.70 and 261,706.20 is: 392,559.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,699.80 : 434,549.70 = 261,706.20 : x
  2. Step 2: Convert to fraction form
    289,699.80/434,549.70 = 261,706.20/x
  3. Step 3: Cross multiply
    289,699.80x = 434,549.70 × 261,706.20
  4. Step 4: Simplify right side
    289,699.80x = 113,724,350,698.14
  5. Step 5: Solve for x
    x = 113,724,350,698.14/289,699.80
  6. Step 6: Final answer
    x = 392,559.30

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1.5x scale

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.