Home / 1,278,709,547.11-1,918,133,078.13-405,379,016.64

Finding the Fourth Proportional to 1,278,709,547.11, 1,918,133,078.13 and 405,379,016.64

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Solution

The fourth proportional to 1,278,709,547.11, 1,918,133,078.13 and 405,379,016.64 is: 608,090,322.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,709,547.11 : 1,918,133,078.13 = 405,379,016.64 : x
  2. Step 2: Convert to fraction form
    1,278,709,547.11/1,918,133,078.13 = 405,379,016.64/x
  3. Step 3: Cross multiply
    1,278,709,547.11x = 1,918,133,078.13 × 405,379,016.64
  4. Step 4: Simplify right side
    1,278,709,547.11x = 777,570,900,996,995,712
  5. Step 5: Solve for x
    x = 777,570,900,996,995,712/1,278,709,547.11
  6. Step 6: Final answer
    x = 608,090,322.59

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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.