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Finding the Fourth Proportional to 639,174.34, 882,034.80 and 352,690.70

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Solution

The fourth proportional to 639,174.34, 882,034.80 and 352,690.70 is: 486,698.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,174.34 : 882,034.80 = 352,690.70 : x
  2. Step 2: Convert to fraction form
    639,174.34/882,034.80 = 352,690.70/x
  3. Step 3: Cross multiply
    639,174.34x = 882,034.80 × 352,690.70
  4. Step 4: Simplify right side
    639,174.34x = 311,085,471,036.36
  5. Step 5: Solve for x
    x = 311,085,471,036.36/639,174.34
  6. Step 6: Final answer
    x = 486,698.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.