Home / 289,340.23-434,290.47-139,685.53

Finding the Fourth Proportional to 289,340.23, 434,290.47 and 139,685.53

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Solution

The fourth proportional to 289,340.23, 434,290.47 and 139,685.53 is: 209,663.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,340.23 : 434,290.47 = 139,685.53 : x
  2. Step 2: Convert to fraction form
    289,340.23/434,290.47 = 139,685.53/x
  3. Step 3: Cross multiply
    289,340.23x = 434,290.47 × 139,685.53
  4. Step 4: Simplify right side
    289,340.23x = 60,664,092,997.31
  5. Step 5: Solve for x
    x = 60,664,092,997.31/289,340.23
  6. Step 6: Final answer
    x = 209,663.53

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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.