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Finding the Fourth Proportional to 456,209.40, 684,314.10 and 123,785.40

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Solution

The fourth proportional to 456,209.40, 684,314.10 and 123,785.40 is: 185,678.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,209.40 : 684,314.10 = 123,785.40 : x
  2. Step 2: Convert to fraction form
    456,209.40/684,314.10 = 123,785.40/x
  3. Step 3: Cross multiply
    456,209.40x = 684,314.10 × 123,785.40
  4. Step 4: Simplify right side
    456,209.40x = 84,708,094,594.14
  5. Step 5: Solve for x
    x = 84,708,094,594.14/456,209.40
  6. Step 6: Final answer
    x = 185,678.10

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Similar ratio
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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.