Home / 1,209,004.31-1,668,425.92-665,128.40

Finding the Fourth Proportional to 1,209,004.31, 1,668,425.92 and 665,128.40

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Solution

The fourth proportional to 1,209,004.31, 1,668,425.92 and 665,128.40 is: 917,877.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,004.31 : 1,668,425.92 = 665,128.40 : x
  2. Step 2: Convert to fraction form
    1,209,004.31/1,668,425.92 = 665,128.40/x
  3. Step 3: Cross multiply
    1,209,004.31x = 1,668,425.92 × 665,128.40
  4. Step 4: Simplify right side
    1,209,004.31x = 1,109,717,452,683.18
  5. Step 5: Solve for x
    x = 1,109,717,452,683.18/1,209,004.31
  6. Step 6: Final answer
    x = 917,877.17

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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.