Home / 842,556.80-1,263,835.20-421,680.80

Finding the Fourth Proportional to 842,556.80, 1,263,835.20 and 421,680.80

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Solution

The fourth proportional to 842,556.80, 1,263,835.20 and 421,680.80 is: 632,521.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    842,556.80 : 1,263,835.20 = 421,680.80 : x
  2. Step 2: Convert to fraction form
    842,556.80/1,263,835.20 = 421,680.80/x
  3. Step 3: Cross multiply
    842,556.80x = 1,263,835.20 × 421,680.80
  4. Step 4: Simplify right side
    842,556.80x = 532,935,038,204.16
  5. Step 5: Solve for x
    x = 532,935,038,204.16/842,556.80
  6. Step 6: Final answer
    x = 632,521.20

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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.