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Finding the Fourth Proportional to 680,909.70, 1,021,364.55 and 470,957.70

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Solution

The fourth proportional to 680,909.70, 1,021,364.55 and 470,957.70 is: 706,436.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,909.70 : 1,021,364.55 = 470,957.70 : x
  2. Step 2: Convert to fraction form
    680,909.70/1,021,364.55 = 470,957.70/x
  3. Step 3: Cross multiply
    680,909.70x = 1,021,364.55 × 470,957.70
  4. Step 4: Simplify right side
    680,909.70x = 481,019,499,329.54
  5. Step 5: Solve for x
    x = 481,019,499,329.54/680,909.70
  6. Step 6: Final answer
    x = 706,436.55

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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.