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Finding the Fourth Proportional to 554,104, 764,663.70 and 315,640

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Solution

The fourth proportional to 554,104, 764,663.70 and 315,640 is: 435,583.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,104 : 764,663.70 = 315,640 : x
  2. Step 2: Convert to fraction form
    554,104/764,663.70 = 315,640/x
  3. Step 3: Cross multiply
    554,104x = 764,663.70 × 315,640
  4. Step 4: Simplify right side
    554,104x = 241,358,450,268
  5. Step 5: Solve for x
    x = 241,358,450,268/554,104
  6. Step 6: Final answer
    x = 435,583.30

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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.