Home / 1,220,090.08-1,830,379.44-421,400.80

Finding the Fourth Proportional to 1,220,090.08, 1,830,379.44 and 421,400.80

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Solution

The fourth proportional to 1,220,090.08, 1,830,379.44 and 421,400.80 is: 632,185.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220,090.08 : 1,830,379.44 = 421,400.80 : x
  2. Step 2: Convert to fraction form
    1,220,090.08/1,830,379.44 = 421,400.80/x
  3. Step 3: Cross multiply
    1,220,090.08x = 1,830,379.44 × 421,400.80
  4. Step 4: Simplify right side
    1,220,090.08x = 771,323,360,319.55
  5. Step 5: Solve for x
    x = 771,323,360,319.55/1,220,090.08
  6. Step 6: Final answer
    x = 632,185.58

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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.