Home / 1,209,012.75-1,668,437.60-665,136.90

Finding the Fourth Proportional to 1,209,012.75, 1,668,437.60 and 665,136.90

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Solution

The fourth proportional to 1,209,012.75, 1,668,437.60 and 665,136.90 is: 917,888.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,012.75 : 1,668,437.60 = 665,136.90 : x
  2. Step 2: Convert to fraction form
    1,209,012.75/1,668,437.60 = 665,136.90/x
  3. Step 3: Cross multiply
    1,209,012.75x = 1,668,437.60 × 665,136.90
  4. Step 4: Simplify right side
    1,209,012.75x = 1,109,739,409,781.76
  5. Step 5: Solve for x
    x = 1,109,739,409,781.76/1,209,012.75
  6. Step 6: Final answer
    x = 917,888.92

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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.