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Finding the Fourth Proportional to 414,000.60, 621,000.90 and 389,506.20

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Solution

The fourth proportional to 414,000.60, 621,000.90 and 389,506.20 is: 584,259.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,000.60 : 621,000.90 = 389,506.20 : x
  2. Step 2: Convert to fraction form
    414,000.60/621,000.90 = 389,506.20/x
  3. Step 3: Cross multiply
    414,000.60x = 621,000.90 × 389,506.20
  4. Step 4: Simplify right side
    414,000.60x = 241,883,700,755.58
  5. Step 5: Solve for x
    x = 241,883,700,755.58/414,000.60
  6. Step 6: Final answer
    x = 584,259.30

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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.