Home / 668,868.80-1,001,942.40-415,371.20

Finding the Fourth Proportional to 668,868.80, 1,001,942.40 and 415,371.20

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Solution

The fourth proportional to 668,868.80, 1,001,942.40 and 415,371.20 is: 622,211.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,868.80 : 1,001,942.40 = 415,371.20 : x
  2. Step 2: Convert to fraction form
    668,868.80/1,001,942.40 = 415,371.20/x
  3. Step 3: Cross multiply
    668,868.80x = 1,001,942.40 × 415,371.20
  4. Step 4: Simplify right side
    668,868.80x = 416,178,017,018.88
  5. Step 5: Solve for x
    x = 416,178,017,018.88/668,868.80
  6. Step 6: Final answer
    x = 622,211.74

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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.