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Finding the Fourth Proportional to 456,086.40, 684,129.60 and 189,758.40

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Solution

The fourth proportional to 456,086.40, 684,129.60 and 189,758.40 is: 284,637.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,086.40 : 684,129.60 = 189,758.40 : x
  2. Step 2: Convert to fraction form
    456,086.40/684,129.60 = 189,758.40/x
  3. Step 3: Cross multiply
    456,086.40x = 684,129.60 × 189,758.40
  4. Step 4: Simplify right side
    456,086.40x = 129,819,338,288.64
  5. Step 5: Solve for x
    x = 129,819,338,288.64/456,086.40
  6. Step 6: Final answer
    x = 284,637.60

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Similar ratio
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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.