Home / 405,075.11-607,237.07-138,772.35

Finding the Fourth Proportional to 405,075.11, 607,237.07 and 138,772.35

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Solution

The fourth proportional to 405,075.11, 607,237.07 and 138,772.35 is: 208,029.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,075.11 : 607,237.07 = 138,772.35 : x
  2. Step 2: Convert to fraction form
    405,075.11/607,237.07 = 138,772.35/x
  3. Step 3: Cross multiply
    405,075.11x = 607,237.07 × 138,772.35
  4. Step 4: Simplify right side
    405,075.11x = 84,267,714,517.15
  5. Step 5: Solve for x
    x = 84,267,714,517.15/405,075.11
  6. Step 6: Final answer
    x = 208,029.85

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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.