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Finding the Fourth Proportional to 321,364.90, 482,047.35 and 238,420.90

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Solution

The fourth proportional to 321,364.90, 482,047.35 and 238,420.90 is: 357,631.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,364.90 : 482,047.35 = 238,420.90 : x
  2. Step 2: Convert to fraction form
    321,364.90/482,047.35 = 238,420.90/x
  3. Step 3: Cross multiply
    321,364.90x = 482,047.35 × 238,420.90
  4. Step 4: Simplify right side
    321,364.90x = 114,930,163,029.62
  5. Step 5: Solve for x
    x = 114,930,163,029.62/321,364.90
  6. Step 6: Final answer
    x = 357,631.35

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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.