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Finding the Fourth Proportional to 639,695.40, 957,460.02 and 471,149.40

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Solution

The fourth proportional to 639,695.40, 957,460.02 and 471,149.40 is: 705,189.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,695.40 : 957,460.02 = 471,149.40 : x
  2. Step 2: Convert to fraction form
    639,695.40/957,460.02 = 471,149.40/x
  3. Step 3: Cross multiply
    639,695.40x = 957,460.02 × 471,149.40
  4. Step 4: Simplify right side
    639,695.40x = 451,106,713,946.99
  5. Step 5: Solve for x
    x = 451,106,713,946.99/639,695.40
  6. Step 6: Final answer
    x = 705,189.87

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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.