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Finding the Fourth Proportional to 321,969.60, 483,040.80 and 287,150.40

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Solution

The fourth proportional to 321,969.60, 483,040.80 and 287,150.40 is: 430,802.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,969.60 : 483,040.80 = 287,150.40 : x
  2. Step 2: Convert to fraction form
    321,969.60/483,040.80 = 287,150.40/x
  3. Step 3: Cross multiply
    321,969.60x = 483,040.80 × 287,150.40
  4. Step 4: Simplify right side
    321,969.60x = 138,705,358,936.32
  5. Step 5: Solve for x
    x = 138,705,358,936.32/321,969.60
  6. Step 6: Final answer
    x = 430,802.66

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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.