Home / 1,209,008.12-1,668,428.70-665,142.60

Finding the Fourth Proportional to 1,209,008.12, 1,668,428.70 and 665,142.60

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Solution

The fourth proportional to 1,209,008.12, 1,668,428.70 and 665,142.60 is: 917,895.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,008.12 : 1,668,428.70 = 665,142.60 : x
  2. Step 2: Convert to fraction form
    1,209,008.12/1,668,428.70 = 665,142.60/x
  3. Step 3: Cross multiply
    1,209,008.12x = 1,668,428.70 × 665,142.60
  4. Step 4: Simplify right side
    1,209,008.12x = 1,109,743,003,432.62
  5. Step 5: Solve for x
    x = 1,109,743,003,432.62/1,209,008.12
  6. Step 6: Final answer
    x = 917,895.41

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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.