Home / 1,123,281.70-1,684,922.55-990,421.45

Finding the Fourth Proportional to 1,123,281.70, 1,684,922.55 and 990,421.45

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Solution

The fourth proportional to 1,123,281.70, 1,684,922.55 and 990,421.45 is: 1,485,632.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123,281.70 : 1,684,922.55 = 990,421.45 : x
  2. Step 2: Convert to fraction form
    1,123,281.70/1,684,922.55 = 990,421.45/x
  3. Step 3: Cross multiply
    1,123,281.70x = 1,684,922.55 × 990,421.45
  4. Step 4: Simplify right side
    1,123,281.70x = 1,668,783,435,108.70
  5. Step 5: Solve for x
    x = 1,668,783,435,108.70/1,123,281.70
  6. Step 6: Final answer
    x = 1,485,632.18

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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.