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Finding the Fourth Proportional to 317,271.28, 476,031.53 and 139,653.77

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Solution

The fourth proportional to 317,271.28, 476,031.53 and 139,653.77 is: 209,535.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,271.28 : 476,031.53 = 139,653.77 : x
  2. Step 2: Convert to fraction form
    317,271.28/476,031.53 = 139,653.77/x
  3. Step 3: Cross multiply
    317,271.28x = 476,031.53 × 139,653.77
  4. Step 4: Simplify right side
    317,271.28x = 66,479,598,450.02
  5. Step 5: Solve for x
    x = 66,479,598,450.02/317,271.28
  6. Step 6: Final answer
    x = 209,535.51

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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.