Home / 1,390,854.40-1,917,494.40-1,189,072.72

Finding the Fourth Proportional to 1,390,854.40, 1,917,494.40 and 1,189,072.72

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Solution

The fourth proportional to 1,390,854.40, 1,917,494.40 and 1,189,072.72 is: 1,639,309.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,854.40 : 1,917,494.40 = 1,189,072.72 : x
  2. Step 2: Convert to fraction form
    1,390,854.40/1,917,494.40 = 1,189,072.72/x
  3. Step 3: Cross multiply
    1,390,854.40x = 1,917,494.40 × 1,189,072.72
  4. Step 4: Simplify right side
    1,390,854.40x = 2,280,040,281,792.77
  5. Step 5: Solve for x
    x = 2,280,040,281,792.77/1,390,854.40
  6. Step 6: Final answer
    x = 1,639,309.11

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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.