Home / 1,385,300.40-2,078,015.40-438,745.20

Finding the Fourth Proportional to 1,385,300.40, 2,078,015.40 and 438,745.20

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Solution

The fourth proportional to 1,385,300.40, 2,078,015.40 and 438,745.20 is: 658,138.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,300.40 : 2,078,015.40 = 438,745.20 : x
  2. Step 2: Convert to fraction form
    1,385,300.40/2,078,015.40 = 438,745.20/x
  3. Step 3: Cross multiply
    1,385,300.40x = 2,078,015.40 × 438,745.20
  4. Step 4: Simplify right side
    1,385,300.40x = 911,719,282,276.08
  5. Step 5: Solve for x
    x = 911,719,282,276.08/1,385,300.40
  6. Step 6: Final answer
    x = 658,138.32

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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.