Home / 1,123,407.80-1,685,111.70-990,438.20

Finding the Fourth Proportional to 1,123,407.80, 1,685,111.70 and 990,438.20

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Solution

The fourth proportional to 1,123,407.80, 1,685,111.70 and 990,438.20 is: 1,485,657.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123,407.80 : 1,685,111.70 = 990,438.20 : x
  2. Step 2: Convert to fraction form
    1,123,407.80/1,685,111.70 = 990,438.20/x
  3. Step 3: Cross multiply
    1,123,407.80x = 1,685,111.70 × 990,438.20
  4. Step 4: Simplify right side
    1,123,407.80x = 1,668,998,998,946.94
  5. Step 5: Solve for x
    x = 1,668,998,998,946.94/1,123,407.80
  6. Step 6: Final answer
    x = 1,485,657.30

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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.