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Finding the Fourth Proportional to 289,863,430.80, 404,947,868.70 and 289,863,430.80

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Solution

The fourth proportional to 289,863,430.80, 404,947,868.70 and 289,863,430.80 is: 404,947,868.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,863,430.80 : 404,947,868.70 = 289,863,430.80 : x
  2. Step 2: Convert to fraction form
    289,863,430.80/404,947,868.70 = 289,863,430.80/x
  3. Step 3: Cross multiply
    289,863,430.80x = 404,947,868.70 × 289,863,430.80
  4. Step 4: Simplify right side
    289,863,430.80x = 117,379,578,516,529,936
  5. Step 5: Solve for x
    x = 117,379,578,516,529,936/289,863,430.80
  6. Step 6: Final answer
    x = 404,947,868.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.