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Finding the Fourth Proportional to 317,427.36, 476,128.08 and 130,434

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Solution

The fourth proportional to 317,427.36, 476,128.08 and 130,434 is: 195,645.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,427.36 : 476,128.08 = 130,434 : x
  2. Step 2: Convert to fraction form
    317,427.36/476,128.08 = 130,434/x
  3. Step 3: Cross multiply
    317,427.36x = 476,128.08 × 130,434
  4. Step 4: Simplify right side
    317,427.36x = 62,103,289,986.72
  5. Step 5: Solve for x
    x = 62,103,289,986.72/317,427.36
  6. Step 6: Final answer
    x = 195,645.67

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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.