Home / 1,209,005.31-1,668,427.30-665,129.40

Finding the Fourth Proportional to 1,209,005.31, 1,668,427.30 and 665,129.40

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Solution

The fourth proportional to 1,209,005.31, 1,668,427.30 and 665,129.40 is: 917,878.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,005.31 : 1,668,427.30 = 665,129.40 : x
  2. Step 2: Convert to fraction form
    1,209,005.31/1,668,427.30 = 665,129.40/x
  3. Step 3: Cross multiply
    1,209,005.31x = 1,668,427.30 × 665,129.40
  4. Step 4: Simplify right side
    1,209,005.31x = 1,109,720,048,992.62
  5. Step 5: Solve for x
    x = 1,109,720,048,992.62/1,209,005.31
  6. Step 6: Final answer
    x = 917,878.56

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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.