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Finding the Fourth Proportional to 313,628.45, 432,804.95 and 170,389.67

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Solution

The fourth proportional to 313,628.45, 432,804.95 and 170,389.67 is: 235,136.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,628.45 : 432,804.95 = 170,389.67 : x
  2. Step 2: Convert to fraction form
    313,628.45/432,804.95 = 170,389.67/x
  3. Step 3: Cross multiply
    313,628.45x = 432,804.95 × 170,389.67
  4. Step 4: Simplify right side
    313,628.45x = 73,745,492,604.87
  5. Step 5: Solve for x
    x = 73,745,492,604.87/313,628.45
  6. Step 6: Final answer
    x = 235,136.49

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1.5x scale

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.