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Finding the Fourth Proportional to 370,405.60, 555,608.40 and 121,112.80

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Solution

The fourth proportional to 370,405.60, 555,608.40 and 121,112.80 is: 181,669.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,405.60 : 555,608.40 = 121,112.80 : x
  2. Step 2: Convert to fraction form
    370,405.60/555,608.40 = 121,112.80/x
  3. Step 3: Cross multiply
    370,405.60x = 555,608.40 × 121,112.80
  4. Step 4: Simplify right side
    370,405.60x = 67,291,289,027.52
  5. Step 5: Solve for x
    x = 67,291,289,027.52/370,405.60
  6. Step 6: Final answer
    x = 181,669.20

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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.