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Finding the Fourth Proportional to 391,098.36, 539,715.81 and 212,250.36

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Solution

The fourth proportional to 391,098.36, 539,715.81 and 212,250.36 is: 292,905.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,098.36 : 539,715.81 = 212,250.36 : x
  2. Step 2: Convert to fraction form
    391,098.36/539,715.81 = 212,250.36/x
  3. Step 3: Cross multiply
    391,098.36x = 539,715.81 × 212,250.36
  4. Step 4: Simplify right side
    391,098.36x = 114,554,874,970.19
  5. Step 5: Solve for x
    x = 114,554,874,970.19/391,098.36
  6. Step 6: Final answer
    x = 292,905.54

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1.5x scale

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.