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Finding the Fourth Proportional to 30,145.60, 45,218.40 and 28,865.80

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Solution

The fourth proportional to 30,145.60, 45,218.40 and 28,865.80 is: 43,298.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,145.60 : 45,218.40 = 28,865.80 : x
  2. Step 2: Convert to fraction form
    30,145.60/45,218.40 = 28,865.80/x
  3. Step 3: Cross multiply
    30,145.60x = 45,218.40 × 28,865.80
  4. Step 4: Simplify right side
    30,145.60x = 1,305,265,290.72
  5. Step 5: Solve for x
    x = 1,305,265,290.72/30,145.60
  6. Step 6: Final answer
    x = 43,298.70

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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.