Home / 1,279,408.40-1,919,371.80-438,045.20

Finding the Fourth Proportional to 1,279,408.40, 1,919,371.80 and 438,045.20

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Solution

The fourth proportional to 1,279,408.40, 1,919,371.80 and 438,045.20 is: 657,156.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,408.40 : 1,919,371.80 = 438,045.20 : x
  2. Step 2: Convert to fraction form
    1,279,408.40/1,919,371.80 = 438,045.20/x
  3. Step 3: Cross multiply
    1,279,408.40x = 1,919,371.80 × 438,045.20
  4. Step 4: Simplify right side
    1,279,408.40x = 840,771,604,005.36
  5. Step 5: Solve for x
    x = 840,771,604,005.36/1,279,408.40
  6. Step 6: Final answer
    x = 657,156.55

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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.