Home / 1,391,790.60-1,920,639.72-810,977.46

Finding the Fourth Proportional to 1,391,790.60, 1,920,639.72 and 810,977.46

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Solution

The fourth proportional to 1,391,790.60, 1,920,639.72 and 810,977.46 is: 1,119,130.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,790.60 : 1,920,639.72 = 810,977.46 : x
  2. Step 2: Convert to fraction form
    1,391,790.60/1,920,639.72 = 810,977.46/x
  3. Step 3: Cross multiply
    1,391,790.60x = 1,920,639.72 × 810,977.46
  4. Step 4: Simplify right side
    1,391,790.60x = 1,557,595,521,700.71
  5. Step 5: Solve for x
    x = 1,557,595,521,700.71/1,391,790.60
  6. Step 6: Final answer
    x = 1,119,130.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.