Home / 426,401.56-638,902.50-145,765.72

Finding the Fourth Proportional to 426,401.56, 638,902.50 and 145,765.72

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Solution

The fourth proportional to 426,401.56, 638,902.50 and 145,765.72 is: 218,409.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,401.56 : 638,902.50 = 145,765.72 : x
  2. Step 2: Convert to fraction form
    426,401.56/638,902.50 = 145,765.72/x
  3. Step 3: Cross multiply
    426,401.56x = 638,902.50 × 145,765.72
  4. Step 4: Simplify right side
    426,401.56x = 93,130,082,922.30
  5. Step 5: Solve for x
    x = 93,130,082,922.30/426,401.56
  6. Step 6: Final answer
    x = 218,409.34

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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.