Home / 1,230,420.78-1,845,620.10-388,972.80

Finding the Fourth Proportional to 1,230,420.78, 1,845,620.10 and 388,972.80

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Solution

The fourth proportional to 1,230,420.78, 1,845,620.10 and 388,972.80 is: 583,455.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230,420.78 : 1,845,620.10 = 388,972.80 : x
  2. Step 2: Convert to fraction form
    1,230,420.78/1,845,620.10 = 388,972.80/x
  3. Step 3: Cross multiply
    1,230,420.78x = 1,845,620.10 × 388,972.80
  4. Step 4: Simplify right side
    1,230,420.78x = 717,896,018,033.28
  5. Step 5: Solve for x
    x = 717,896,018,033.28/1,230,420.78
  6. Step 6: Final answer
    x = 583,455.70

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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.