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Finding the Fourth Proportional to 378,448.58, 522,385.53 and 225,534.76

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Solution

The fourth proportional to 378,448.58, 522,385.53 and 225,534.76 is: 311,313.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,448.58 : 522,385.53 = 225,534.76 : x
  2. Step 2: Convert to fraction form
    378,448.58/522,385.53 = 225,534.76/x
  3. Step 3: Cross multiply
    378,448.58x = 522,385.53 × 225,534.76
  4. Step 4: Simplify right side
    378,448.58x = 117,816,095,136.02
  5. Step 5: Solve for x
    x = 117,816,095,136.02/378,448.58
  6. Step 6: Final answer
    x = 311,313.35

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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.