Home / 1,288,565.31-1,779,109.74-805,347.66

Finding the Fourth Proportional to 1,288,565.31, 1,779,109.74 and 805,347.66

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Solution

The fourth proportional to 1,288,565.31, 1,779,109.74 and 805,347.66 is: 1,111,935.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,565.31 : 1,779,109.74 = 805,347.66 : x
  2. Step 2: Convert to fraction form
    1,288,565.31/1,779,109.74 = 805,347.66/x
  3. Step 3: Cross multiply
    1,288,565.31x = 1,779,109.74 × 805,347.66
  4. Step 4: Simplify right side
    1,288,565.31x = 1,432,801,865,992.21
  5. Step 5: Solve for x
    x = 1,432,801,865,992.21/1,288,565.31
  6. Step 6: Final answer
    x = 1,111,935.77

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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.