Home / 825,401.20-1,238,101.80-426,820.45

Finding the Fourth Proportional to 825,401.20, 1,238,101.80 and 426,820.45

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Solution

The fourth proportional to 825,401.20, 1,238,101.80 and 426,820.45 is: 640,230.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    825,401.20 : 1,238,101.80 = 426,820.45 : x
  2. Step 2: Convert to fraction form
    825,401.20/1,238,101.80 = 426,820.45/x
  3. Step 3: Cross multiply
    825,401.20x = 1,238,101.80 × 426,820.45
  4. Step 4: Simplify right side
    825,401.20x = 528,447,167,421.81
  5. Step 5: Solve for x
    x = 528,447,167,421.81/825,401.20
  6. Step 6: Final answer
    x = 640,230.68

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Double scale
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Similar ratio
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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.