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Finding the Fourth Proportional to 470,866.60, 706,688.70 and 218,535.40

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Solution

The fourth proportional to 470,866.60, 706,688.70 and 218,535.40 is: 327,983.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,866.60 : 706,688.70 = 218,535.40 : x
  2. Step 2: Convert to fraction form
    470,866.60/706,688.70 = 218,535.40/x
  3. Step 3: Cross multiply
    470,866.60x = 706,688.70 × 218,535.40
  4. Step 4: Simplify right side
    470,866.60x = 154,436,497,729.98
  5. Step 5: Solve for x
    x = 154,436,497,729.98/470,866.60
  6. Step 6: Final answer
    x = 327,983.55

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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.