Home / 1,209,007.81-1,668,430.75-665,131.90

Finding the Fourth Proportional to 1,209,007.81, 1,668,430.75 and 665,131.90

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Solution

The fourth proportional to 1,209,007.81, 1,668,430.75 and 665,131.90 is: 917,882.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,007.81 : 1,668,430.75 = 665,131.90 : x
  2. Step 2: Convert to fraction form
    1,209,007.81/1,668,430.75 = 665,131.90/x
  3. Step 3: Cross multiply
    1,209,007.81x = 1,668,430.75 × 665,131.90
  4. Step 4: Simplify right side
    1,209,007.81x = 1,109,726,514,765.93
  5. Step 5: Solve for x
    x = 1,109,726,514,765.93/1,209,007.81
  6. Step 6: Final answer
    x = 917,882.01

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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.