Home / 1,238,695.80-1,858,043.70-989,863.80

Finding the Fourth Proportional to 1,238,695.80, 1,858,043.70 and 989,863.80

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Solution

The fourth proportional to 1,238,695.80, 1,858,043.70 and 989,863.80 is: 1,484,795.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238,695.80 : 1,858,043.70 = 989,863.80 : x
  2. Step 2: Convert to fraction form
    1,238,695.80/1,858,043.70 = 989,863.80/x
  3. Step 3: Cross multiply
    1,238,695.80x = 1,858,043.70 × 989,863.80
  4. Step 4: Simplify right side
    1,238,695.80x = 1,839,210,197,448.06
  5. Step 5: Solve for x
    x = 1,839,210,197,448.06/1,238,695.80
  6. Step 6: Final answer
    x = 1,484,795.70

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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.