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Finding the Fourth Proportional to 255,718.40, 383,516.16 and 130,995.20

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Solution

The fourth proportional to 255,718.40, 383,516.16 and 130,995.20 is: 196,461.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,718.40 : 383,516.16 = 130,995.20 : x
  2. Step 2: Convert to fraction form
    255,718.40/383,516.16 = 130,995.20/x
  3. Step 3: Cross multiply
    255,718.40x = 383,516.16 × 130,995.20
  4. Step 4: Simplify right side
    255,718.40x = 50,238,776,082.43
  5. Step 5: Solve for x
    x = 50,238,776,082.43/255,718.40
  6. Step 6: Final answer
    x = 196,461.33

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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.