Home / 289,516.28-434,362.23-139,728.65

Finding the Fourth Proportional to 289,516.28, 434,362.23 and 139,728.65

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Solution

The fourth proportional to 289,516.28, 434,362.23 and 139,728.65 is: 209,635.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,516.28 : 434,362.23 = 139,728.65 : x
  2. Step 2: Convert to fraction form
    289,516.28/434,362.23 = 139,728.65/x
  3. Step 3: Cross multiply
    289,516.28x = 434,362.23 × 139,728.65
  4. Step 4: Simplify right side
    289,516.28x = 60,692,845,837.08
  5. Step 5: Solve for x
    x = 60,692,845,837.08/289,516.28
  6. Step 6: Final answer
    x = 209,635.35

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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.