Home / 393,424.12-543,121.35-257,666.10

Finding the Fourth Proportional to 393,424.12, 543,121.35 and 257,666.10

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Solution

The fourth proportional to 393,424.12, 543,121.35 and 257,666.10 is: 355,707.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,424.12 : 543,121.35 = 257,666.10 : x
  2. Step 2: Convert to fraction form
    393,424.12/543,121.35 = 257,666.10/x
  3. Step 3: Cross multiply
    393,424.12x = 543,121.35 × 257,666.10
  4. Step 4: Simplify right side
    393,424.12x = 139,943,958,527.65
  5. Step 5: Solve for x
    x = 139,943,958,527.65/393,424.12
  6. Step 6: Final answer
    x = 355,707.62

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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.