Home / 1,388,221,055.71-1,915,780,309.47-761,689,317.58

Finding the Fourth Proportional to 1,388,221,055.71, 1,915,780,309.47 and 761,689,317.58

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Solution

The fourth proportional to 1,388,221,055.71, 1,915,780,309.47 and 761,689,317.58 is: 1,051,150,600.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,221,055.71 : 1,915,780,309.47 = 761,689,317.58 : x
  2. Step 2: Convert to fraction form
    1,388,221,055.71/1,915,780,309.47 = 761,689,317.58/x
  3. Step 3: Cross multiply
    1,388,221,055.71x = 1,915,780,309.47 × 761,689,317.58
  4. Step 4: Simplify right side
    1,388,221,055.71x = 1,459,229,396,548,615,936
  5. Step 5: Solve for x
    x = 1,459,229,396,548,615,936/1,388,221,055.71
  6. Step 6: Final answer
    x = 1,051,150,600.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.