Home / 1,247,386.40-1,871,122.80-394,467.20

Finding the Fourth Proportional to 1,247,386.40, 1,871,122.80 and 394,467.20

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Solution

The fourth proportional to 1,247,386.40, 1,871,122.80 and 394,467.20 is: 591,714.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247,386.40 : 1,871,122.80 = 394,467.20 : x
  2. Step 2: Convert to fraction form
    1,247,386.40/1,871,122.80 = 394,467.20/x
  3. Step 3: Cross multiply
    1,247,386.40x = 1,871,122.80 × 394,467.20
  4. Step 4: Simplify right side
    1,247,386.40x = 738,096,571,772.16
  5. Step 5: Solve for x
    x = 738,096,571,772.16/1,247,386.40
  6. Step 6: Final answer
    x = 591,714.46

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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.