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Finding the Fourth Proportional to 457,401.40, 685,518.90 and 220,233.40

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Solution

The fourth proportional to 457,401.40, 685,518.90 and 220,233.40 is: 330,069.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,401.40 : 685,518.90 = 220,233.40 : x
  2. Step 2: Convert to fraction form
    457,401.40/685,518.90 = 220,233.40/x
  3. Step 3: Cross multiply
    457,401.40x = 685,518.90 × 220,233.40
  4. Step 4: Simplify right side
    457,401.40x = 150,974,158,111.26
  5. Step 5: Solve for x
    x = 150,974,158,111.26/457,401.40
  6. Step 6: Final answer
    x = 330,069.30

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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.