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Finding the Fourth Proportional to 470,857.80, 706,286.70 and 329,140.20

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Solution

The fourth proportional to 470,857.80, 706,286.70 and 329,140.20 is: 493,710.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,857.80 : 706,286.70 = 329,140.20 : x
  2. Step 2: Convert to fraction form
    470,857.80/706,286.70 = 329,140.20/x
  3. Step 3: Cross multiply
    470,857.80x = 706,286.70 × 329,140.20
  4. Step 4: Simplify right side
    470,857.80x = 232,467,345,695.34
  5. Step 5: Solve for x
    x = 232,467,345,695.34/470,857.80
  6. Step 6: Final answer
    x = 493,710.30

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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.