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Finding the Fourth Proportional to 426,674.64, 639,501.66 and 189,749.64

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Solution

The fourth proportional to 426,674.64, 639,501.66 and 189,749.64 is: 284,397.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,674.64 : 639,501.66 = 189,749.64 : x
  2. Step 2: Convert to fraction form
    426,674.64/639,501.66 = 189,749.64/x
  3. Step 3: Cross multiply
    426,674.64x = 639,501.66 × 189,749.64
  4. Step 4: Simplify right side
    426,674.64x = 121,345,209,764.40
  5. Step 5: Solve for x
    x = 121,345,209,764.40/426,674.64
  6. Step 6: Final answer
    x = 284,397.52

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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.