Home / 809,939.79-1,117,728.72-470,408.04

Finding the Fourth Proportional to 809,939.79, 1,117,728.72 and 470,408.04

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Solution

The fourth proportional to 809,939.79, 1,117,728.72 and 470,408.04 is: 649,169.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,939.79 : 1,117,728.72 = 470,408.04 : x
  2. Step 2: Convert to fraction form
    809,939.79/1,117,728.72 = 470,408.04/x
  3. Step 3: Cross multiply
    809,939.79x = 1,117,728.72 × 470,408.04
  4. Step 4: Simplify right side
    809,939.79x = 525,788,576,426.91
  5. Step 5: Solve for x
    x = 525,788,576,426.91/809,939.79
  6. Step 6: Final answer
    x = 649,169.95

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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.