Home / 1,119,319.40-1,678,784.70-408,981.80

Finding the Fourth Proportional to 1,119,319.40, 1,678,784.70 and 408,981.80

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Solution

The fourth proportional to 1,119,319.40, 1,678,784.70 and 408,981.80 is: 613,401.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119,319.40 : 1,678,784.70 = 408,981.80 : x
  2. Step 2: Convert to fraction form
    1,119,319.40/1,678,784.70 = 408,981.80/x
  3. Step 3: Cross multiply
    1,119,319.40x = 1,678,784.70 × 408,981.80
  4. Step 4: Simplify right side
    1,119,319.40x = 686,592,388,418.46
  5. Step 5: Solve for x
    x = 686,592,388,418.46/1,119,319.40
  6. Step 6: Final answer
    x = 613,401.67

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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.