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Finding the Fourth Proportional to 371,505.40, 512,679.41 and 210,391.81

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Solution

The fourth proportional to 371,505.40, 512,679.41 and 210,391.81 is: 290,341.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,505.40 : 512,679.41 = 210,391.81 : x
  2. Step 2: Convert to fraction form
    371,505.40/512,679.41 = 210,391.81/x
  3. Step 3: Cross multiply
    371,505.40x = 512,679.41 × 210,391.81
  4. Step 4: Simplify right side
    371,505.40x = 107,863,547,474.94
  5. Step 5: Solve for x
    x = 107,863,547,474.94/371,505.40
  6. Step 6: Final answer
    x = 290,341.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.