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Finding the Fourth Proportional to 321,065.40, 443,368.08 and 240,352.80

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Solution

The fourth proportional to 321,065.40, 443,368.08 and 240,352.80 is: 331,909.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,065.40 : 443,368.08 = 240,352.80 : x
  2. Step 2: Convert to fraction form
    321,065.40/443,368.08 = 240,352.80/x
  3. Step 3: Cross multiply
    321,065.40x = 443,368.08 × 240,352.80
  4. Step 4: Simplify right side
    321,065.40x = 106,564,759,458.62
  5. Step 5: Solve for x
    x = 106,564,759,458.62/321,065.40
  6. Step 6: Final answer
    x = 331,909.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.