Home / 421,103.07-581,136.63-230,128.77

Finding the Fourth Proportional to 421,103.07, 581,136.63 and 230,128.77

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Solution

The fourth proportional to 421,103.07, 581,136.63 and 230,128.77 is: 317,585.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,103.07 : 581,136.63 = 230,128.77 : x
  2. Step 2: Convert to fraction form
    421,103.07/581,136.63 = 230,128.77/x
  3. Step 3: Cross multiply
    421,103.07x = 581,136.63 × 230,128.77
  4. Step 4: Simplify right side
    421,103.07x = 133,736,257,863.85
  5. Step 5: Solve for x
    x = 133,736,257,863.85/421,103.07
  6. Step 6: Final answer
    x = 317,585.57

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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.