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Finding the Fourth Proportional to 289,242.53, 434,143.67 and 139,588.17

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Solution

The fourth proportional to 289,242.53, 434,143.67 and 139,588.17 is: 209,517.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,242.53 : 434,143.67 = 139,588.17 : x
  2. Step 2: Convert to fraction form
    289,242.53/434,143.67 = 139,588.17/x
  3. Step 3: Cross multiply
    289,242.53x = 434,143.67 × 139,588.17
  4. Step 4: Simplify right side
    289,242.53x = 60,601,320,412.38
  5. Step 5: Solve for x
    x = 60,601,320,412.38/289,242.53
  6. Step 6: Final answer
    x = 209,517.32

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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.