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Finding the Fourth Proportional to 286,809.56, 430,210.68 and 128,926.38

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Solution

The fourth proportional to 286,809.56, 430,210.68 and 128,926.38 is: 193,387.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,809.56 : 430,210.68 = 128,926.38 : x
  2. Step 2: Convert to fraction form
    286,809.56/430,210.68 = 128,926.38/x
  3. Step 3: Cross multiply
    286,809.56x = 430,210.68 × 128,926.38
  4. Step 4: Simplify right side
    286,809.56x = 55,465,505,609.74
  5. Step 5: Solve for x
    x = 55,465,505,609.74/286,809.56
  6. Step 6: Final answer
    x = 193,387.93

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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.