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Finding the Fourth Proportional to 806,708.70, 1,208,313.45 and 666,740.70

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Solution

The fourth proportional to 806,708.70, 1,208,313.45 and 666,740.70 is: 998,665.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,708.70 : 1,208,313.45 = 666,740.70 : x
  2. Step 2: Convert to fraction form
    806,708.70/1,208,313.45 = 666,740.70/x
  3. Step 3: Cross multiply
    806,708.70x = 1,208,313.45 × 666,740.70
  4. Step 4: Simplify right side
    806,708.70x = 805,631,755,472.42
  5. Step 5: Solve for x
    x = 805,631,755,472.42/806,708.70
  6. Step 6: Final answer
    x = 998,665.01

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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.