Home / 1,390,873.82-1,919,276.79-787,261.82

Finding the Fourth Proportional to 1,390,873.82, 1,919,276.79 and 787,261.82

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Solution

The fourth proportional to 1,390,873.82, 1,919,276.79 and 787,261.82 is: 1,086,348.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,873.82 : 1,919,276.79 = 787,261.82 : x
  2. Step 2: Convert to fraction form
    1,390,873.82/1,919,276.79 = 787,261.82/x
  3. Step 3: Cross multiply
    1,390,873.82x = 1,919,276.79 × 787,261.82
  4. Step 4: Simplify right side
    1,390,873.82x = 1,510,973,338,779.16
  5. Step 5: Solve for x
    x = 1,510,973,338,779.16/1,390,873.82
  6. Step 6: Final answer
    x = 1,086,348.25

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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.