Home / 1,238,089.40-1,708,581.42-721,829.21

Finding the Fourth Proportional to 1,238,089.40, 1,708,581.42 and 721,829.21

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Solution

The fourth proportional to 1,238,089.40, 1,708,581.42 and 721,829.21 is: 996,134.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238,089.40 : 1,708,581.42 = 721,829.21 : x
  2. Step 2: Convert to fraction form
    1,238,089.40/1,708,581.42 = 721,829.21/x
  3. Step 3: Cross multiply
    1,238,089.40x = 1,708,581.42 × 721,829.21
  4. Step 4: Simplify right side
    1,238,089.40x = 1,233,303,980,890.73
  5. Step 5: Solve for x
    x = 1,233,303,980,890.73/1,238,089.40
  6. Step 6: Final answer
    x = 996,134.84

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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.