Home / 1,238,918,937.64-1,858,398,112.14-689,712,149.32

Finding the Fourth Proportional to 1,238,918,937.64, 1,858,398,112.14 and 689,712,149.32

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Solution

The fourth proportional to 1,238,918,937.64, 1,858,398,112.14 and 689,712,149.32 is: 1,034,579,194.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238,918,937.64 : 1,858,398,112.14 = 689,712,149.32 : x
  2. Step 2: Convert to fraction form
    1,238,918,937.64/1,858,398,112.14 = 689,712,149.32/x
  3. Step 3: Cross multiply
    1,238,918,937.64x = 1,858,398,112.14 × 689,712,149.32
  4. Step 4: Simplify right side
    1,238,918,937.64x = 1,281,759,756,216,310,016
  5. Step 5: Solve for x
    x = 1,281,759,756,216,310,016/1,238,918,937.64
  6. Step 6: Final answer
    x = 1,034,579,194.23

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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.