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Finding the Fourth Proportional to 286,686, 430,119.72 and 128,928.24

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Solution

The fourth proportional to 286,686, 430,119.72 and 128,928.24 is: 193,433.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,686 : 430,119.72 = 128,928.24 : x
  2. Step 2: Convert to fraction form
    286,686/430,119.72 = 128,928.24/x
  3. Step 3: Cross multiply
    286,686x = 430,119.72 × 128,928.24
  4. Step 4: Simplify right side
    286,686x = 55,454,578,488.89
  5. Step 5: Solve for x
    x = 55,454,578,488.89/286,686
  6. Step 6: Final answer
    x = 193,433.16

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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.