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Finding the Fourth Proportional to 378,317.04, 522,019.80 and 225,308.40

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Solution

The fourth proportional to 378,317.04, 522,019.80 and 225,308.40 is: 310,891.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,317.04 : 522,019.80 = 225,308.40 : x
  2. Step 2: Convert to fraction form
    378,317.04/522,019.80 = 225,308.40/x
  3. Step 3: Cross multiply
    378,317.04x = 522,019.80 × 225,308.40
  4. Step 4: Simplify right side
    378,317.04x = 117,615,445,906.32
  5. Step 5: Solve for x
    x = 117,615,445,906.32/378,317.04
  6. Step 6: Final answer
    x = 310,891.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.