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Finding the Fourth Proportional to 389,639.70, 584,459.55 and 223,290.90

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Solution

The fourth proportional to 389,639.70, 584,459.55 and 223,290.90 is: 334,936.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,639.70 : 584,459.55 = 223,290.90 : x
  2. Step 2: Convert to fraction form
    389,639.70/584,459.55 = 223,290.90/x
  3. Step 3: Cross multiply
    389,639.70x = 584,459.55 × 223,290.90
  4. Step 4: Simplify right side
    389,639.70x = 130,504,498,933.10
  5. Step 5: Solve for x
    x = 130,504,498,933.10/389,639.70
  6. Step 6: Final answer
    x = 334,936.35

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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.