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Finding the Fourth Proportional to 320,011.70, 480,017.55 and 259,877.30

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Solution

The fourth proportional to 320,011.70, 480,017.55 and 259,877.30 is: 389,815.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,011.70 : 480,017.55 = 259,877.30 : x
  2. Step 2: Convert to fraction form
    320,011.70/480,017.55 = 259,877.30/x
  3. Step 3: Cross multiply
    320,011.70x = 480,017.55 × 259,877.30
  4. Step 4: Simplify right side
    320,011.70x = 124,745,664,846.62
  5. Step 5: Solve for x
    x = 124,745,664,846.62/320,011.70
  6. Step 6: Final answer
    x = 389,815.95

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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.