Home / 678,430.14-1,017,666.81-341,286.54

Finding the Fourth Proportional to 678,430.14, 1,017,666.81 and 341,286.54

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Solution

The fourth proportional to 678,430.14, 1,017,666.81 and 341,286.54 is: 511,940.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,430.14 : 1,017,666.81 = 341,286.54 : x
  2. Step 2: Convert to fraction form
    678,430.14/1,017,666.81 = 341,286.54/x
  3. Step 3: Cross multiply
    678,430.14x = 1,017,666.81 × 341,286.54
  4. Step 4: Simplify right side
    678,430.14x = 347,315,984,457.74
  5. Step 5: Solve for x
    x = 347,315,984,457.74/678,430.14
  6. Step 6: Final answer
    x = 511,940.68

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1.5x scale

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.