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Finding the Fourth Proportional to 456,774.30, 685,161.45 and 220,140.90

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Solution

The fourth proportional to 456,774.30, 685,161.45 and 220,140.90 is: 330,211.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,774.30 : 685,161.45 = 220,140.90 : x
  2. Step 2: Convert to fraction form
    456,774.30/685,161.45 = 220,140.90/x
  3. Step 3: Cross multiply
    456,774.30x = 685,161.45 × 220,140.90
  4. Step 4: Simplify right side
    456,774.30x = 150,832,058,248.31
  5. Step 5: Solve for x
    x = 150,832,058,248.31/456,774.30
  6. Step 6: Final answer
    x = 330,211.35

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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.