Home / 1,278,709,542.15-1,918,133,070.71-405,379,011.71

Finding the Fourth Proportional to 1,278,709,542.15, 1,918,133,070.71 and 405,379,011.71

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Solution

The fourth proportional to 1,278,709,542.15, 1,918,133,070.71 and 405,379,011.71 is: 608,090,315.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,709,542.15 : 1,918,133,070.71 = 405,379,011.71 : x
  2. Step 2: Convert to fraction form
    1,278,709,542.15/1,918,133,070.71 = 405,379,011.71/x
  3. Step 3: Cross multiply
    1,278,709,542.15x = 1,918,133,070.71 × 405,379,011.71
  4. Step 4: Simplify right side
    1,278,709,542.15x = 777,570,888,521,069,696
  5. Step 5: Solve for x
    x = 777,570,888,521,069,696/1,278,709,542.15
  6. Step 6: Final answer
    x = 608,090,315.19

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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.