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Finding the Fourth Proportional to 330,920.64, 496,458.72 and 143,985.60

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Solution

The fourth proportional to 330,920.64, 496,458.72 and 143,985.60 is: 216,012.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,920.64 : 496,458.72 = 143,985.60 : x
  2. Step 2: Convert to fraction form
    330,920.64/496,458.72 = 143,985.60/x
  3. Step 3: Cross multiply
    330,920.64x = 496,458.72 × 143,985.60
  4. Step 4: Simplify right side
    330,920.64x = 71,482,906,674.43
  5. Step 5: Solve for x
    x = 71,482,906,674.43/330,920.64
  6. Step 6: Final answer
    x = 216,012.23

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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.