Home / 1,311,828.28-1,965,669.90-990,459.16

Finding the Fourth Proportional to 1,311,828.28, 1,965,669.90 and 990,459.16

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Solution

The fourth proportional to 1,311,828.28, 1,965,669.90 and 990,459.16 is: 1,484,123.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311,828.28 : 1,965,669.90 = 990,459.16 : x
  2. Step 2: Convert to fraction form
    1,311,828.28/1,965,669.90 = 990,459.16/x
  3. Step 3: Cross multiply
    1,311,828.28x = 1,965,669.90 × 990,459.16
  4. Step 4: Simplify right side
    1,311,828.28x = 1,946,915,757,991.28
  5. Step 5: Solve for x
    x = 1,946,915,757,991.28/1,311,828.28
  6. Step 6: Final answer
    x = 1,484,123.94

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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.