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Finding the Fourth Proportional to 289,618.80, 434,233.80 and 139,930.80

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Solution

The fourth proportional to 289,618.80, 434,233.80 and 139,930.80 is: 209,802.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,618.80 : 434,233.80 = 139,930.80 : x
  2. Step 2: Convert to fraction form
    289,618.80/434,233.80 = 139,930.80/x
  3. Step 3: Cross multiply
    289,618.80x = 434,233.80 × 139,930.80
  4. Step 4: Simplify right side
    289,618.80x = 60,762,683,021.04
  5. Step 5: Solve for x
    x = 60,762,683,021.04/289,618.80
  6. Step 6: Final answer
    x = 209,802.27

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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.