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Finding the Fourth Proportional to 286,668.40, 430,002.60 and 86,979.10

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Solution

The fourth proportional to 286,668.40, 430,002.60 and 86,979.10 is: 130,468.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,668.40 : 430,002.60 = 86,979.10 : x
  2. Step 2: Convert to fraction form
    286,668.40/430,002.60 = 86,979.10/x
  3. Step 3: Cross multiply
    286,668.40x = 430,002.60 × 86,979.10
  4. Step 4: Simplify right side
    286,668.40x = 37,401,239,145.66
  5. Step 5: Solve for x
    x = 37,401,239,145.66/286,668.40
  6. Step 6: Final answer
    x = 130,468.65

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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.