Home / 782,401.07-1,173,601.58-427,221.34

Finding the Fourth Proportional to 782,401.07, 1,173,601.58 and 427,221.34

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Solution

The fourth proportional to 782,401.07, 1,173,601.58 and 427,221.34 is: 640,831.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    782,401.07 : 1,173,601.58 = 427,221.34 : x
  2. Step 2: Convert to fraction form
    782,401.07/1,173,601.58 = 427,221.34/x
  3. Step 3: Cross multiply
    782,401.07x = 1,173,601.58 × 427,221.34
  4. Step 4: Simplify right side
    782,401.07x = 501,387,634,563.61
  5. Step 5: Solve for x
    x = 501,387,634,563.61/782,401.07
  6. Step 6: Final answer
    x = 640,831.99

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1.5x scale

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.