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Finding the Fourth Proportional to 412,858.40, 619,287.60 and 349,872.80

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Solution

The fourth proportional to 412,858.40, 619,287.60 and 349,872.80 is: 524,809.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,858.40 : 619,287.60 = 349,872.80 : x
  2. Step 2: Convert to fraction form
    412,858.40/619,287.60 = 349,872.80/x
  3. Step 3: Cross multiply
    412,858.40x = 619,287.60 × 349,872.80
  4. Step 4: Simplify right side
    412,858.40x = 216,671,886,617.28
  5. Step 5: Solve for x
    x = 216,671,886,617.28/412,858.40
  6. Step 6: Final answer
    x = 524,809.20

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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.