Home / 1,277,457,789.80-1,916,186,684.70-869,311,101.80

Finding the Fourth Proportional to 1,277,457,789.80, 1,916,186,684.70 and 869,311,101.80

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Solution

The fourth proportional to 1,277,457,789.80, 1,916,186,684.70 and 869,311,101.80 is: 1,303,966,652.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277,457,789.80 : 1,916,186,684.70 = 869,311,101.80 : x
  2. Step 2: Convert to fraction form
    1,277,457,789.80/1,916,186,684.70 = 869,311,101.80/x
  3. Step 3: Cross multiply
    1,277,457,789.80x = 1,916,186,684.70 × 869,311,101.80
  4. Step 4: Simplify right side
    1,277,457,789.80x = 1,665,762,358,131,046,144
  5. Step 5: Solve for x
    x = 1,665,762,358,131,046,144/1,277,457,789.80
  6. Step 6: Final answer
    x = 1,303,966,652.70

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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.