Home / 1,328,556.80-1,992,835.20-921,118.70

Finding the Fourth Proportional to 1,328,556.80, 1,992,835.20 and 921,118.70

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Solution

The fourth proportional to 1,328,556.80, 1,992,835.20 and 921,118.70 is: 1,381,678.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,556.80 : 1,992,835.20 = 921,118.70 : x
  2. Step 2: Convert to fraction form
    1,328,556.80/1,992,835.20 = 921,118.70/x
  3. Step 3: Cross multiply
    1,328,556.80x = 1,992,835.20 × 921,118.70
  4. Step 4: Simplify right side
    1,328,556.80x = 1,835,637,768,738.24
  5. Step 5: Solve for x
    x = 1,835,637,768,738.24/1,328,556.80
  6. Step 6: Final answer
    x = 1,381,678.05

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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.