Home / 1,390,771.22-1,918,935.30-787,159.22

Finding the Fourth Proportional to 1,390,771.22, 1,918,935.30 and 787,159.22

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Solution

The fourth proportional to 1,390,771.22, 1,918,935.30 and 787,159.22 is: 1,086,093.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,771.22 : 1,918,935.30 = 787,159.22 : x
  2. Step 2: Convert to fraction form
    1,390,771.22/1,918,935.30 = 787,159.22/x
  3. Step 3: Cross multiply
    1,390,771.22x = 1,918,935.30 × 787,159.22
  4. Step 4: Simplify right side
    1,390,771.22x = 1,510,507,613,978.47
  5. Step 5: Solve for x
    x = 1,510,507,613,978.47/1,390,771.22
  6. Step 6: Final answer
    x = 1,086,093.52

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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.