Home / 289,386.23-434,203.90-139,738.54

Finding the Fourth Proportional to 289,386.23, 434,203.90 and 139,738.54

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Solution

The fourth proportional to 289,386.23, 434,203.90 and 139,738.54 is: 209,667.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,386.23 : 434,203.90 = 139,738.54 : x
  2. Step 2: Convert to fraction form
    289,386.23/434,203.90 = 139,738.54/x
  3. Step 3: Cross multiply
    289,386.23x = 434,203.90 × 139,738.54
  4. Step 4: Simplify right side
    289,386.23x = 60,675,017,883.62
  5. Step 5: Solve for x
    x = 60,675,017,883.62/289,386.23
  6. Step 6: Final answer
    x = 209,667.95

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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.