Home / 1,325,385.40-1,988,078.10-438,921.40

Finding the Fourth Proportional to 1,325,385.40, 1,988,078.10 and 438,921.40

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Solution

The fourth proportional to 1,325,385.40, 1,988,078.10 and 438,921.40 is: 658,382.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325,385.40 : 1,988,078.10 = 438,921.40 : x
  2. Step 2: Convert to fraction form
    1,325,385.40/1,988,078.10 = 438,921.40/x
  3. Step 3: Cross multiply
    1,325,385.40x = 1,988,078.10 × 438,921.40
  4. Step 4: Simplify right side
    1,325,385.40x = 872,610,022,961.34
  5. Step 5: Solve for x
    x = 872,610,022,961.34/1,325,385.40
  6. Step 6: Final answer
    x = 658,382.10

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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.