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Finding the Fourth Proportional to 320,438.80, 480,658.20 and 304,886.80

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Solution

The fourth proportional to 320,438.80, 480,658.20 and 304,886.80 is: 457,330.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,438.80 : 480,658.20 = 304,886.80 : x
  2. Step 2: Convert to fraction form
    320,438.80/480,658.20 = 304,886.80/x
  3. Step 3: Cross multiply
    320,438.80x = 480,658.20 × 304,886.80
  4. Step 4: Simplify right side
    320,438.80x = 146,546,340,491.76
  5. Step 5: Solve for x
    x = 146,546,340,491.76/320,438.80
  6. Step 6: Final answer
    x = 457,330.20

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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.