Home / 458,520.45-687,811.05-121,556.40

Finding the Fourth Proportional to 458,520.45, 687,811.05 and 121,556.40

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Solution

The fourth proportional to 458,520.45, 687,811.05 and 121,556.40 is: 182,342.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,520.45 : 687,811.05 = 121,556.40 : x
  2. Step 2: Convert to fraction form
    458,520.45/687,811.05 = 121,556.40/x
  3. Step 3: Cross multiply
    458,520.45x = 687,811.05 × 121,556.40
  4. Step 4: Simplify right side
    458,520.45x = 83,607,835,118.22
  5. Step 5: Solve for x
    x = 83,607,835,118.22/458,520.45
  6. Step 6: Final answer
    x = 182,342.65

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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.