Home / 1,385,399.40-2,078,099.10-912,618.60

Finding the Fourth Proportional to 1,385,399.40, 2,078,099.10 and 912,618.60

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Solution

The fourth proportional to 1,385,399.40, 2,078,099.10 and 912,618.60 is: 1,368,927.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,399.40 : 2,078,099.10 = 912,618.60 : x
  2. Step 2: Convert to fraction form
    1,385,399.40/2,078,099.10 = 912,618.60/x
  3. Step 3: Cross multiply
    1,385,399.40x = 2,078,099.10 × 912,618.60
  4. Step 4: Simplify right side
    1,385,399.40x = 1,896,511,891,303.26
  5. Step 5: Solve for x
    x = 1,896,511,891,303.26/1,385,399.40
  6. Step 6: Final answer
    x = 1,368,927.90

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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.