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Finding the Fourth Proportional to 553,249.45, 763,525.07 and 311,558.41

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Solution

The fourth proportional to 553,249.45, 763,525.07 and 311,558.41 is: 429,973.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,249.45 : 763,525.07 = 311,558.41 : x
  2. Step 2: Convert to fraction form
    553,249.45/763,525.07 = 311,558.41/x
  3. Step 3: Cross multiply
    553,249.45x = 763,525.07 × 311,558.41
  4. Step 4: Simplify right side
    553,249.45x = 237,882,656,804.34
  5. Step 5: Solve for x
    x = 237,882,656,804.34/553,249.45
  6. Step 6: Final answer
    x = 429,973.60

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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.