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Finding the Fourth Proportional to 483,211.80, 724,817.70 and 439,666.20

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Solution

The fourth proportional to 483,211.80, 724,817.70 and 439,666.20 is: 659,499.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,211.80 : 724,817.70 = 439,666.20 : x
  2. Step 2: Convert to fraction form
    483,211.80/724,817.70 = 439,666.20/x
  3. Step 3: Cross multiply
    483,211.80x = 724,817.70 × 439,666.20
  4. Step 4: Simplify right side
    483,211.80x = 318,677,843,851.74
  5. Step 5: Solve for x
    x = 318,677,843,851.74/483,211.80
  6. Step 6: Final answer
    x = 659,499.30

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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.