Home / 1,209,412.68-1,668,431.08-779,830.80

Finding the Fourth Proportional to 1,209,412.68, 1,668,431.08 and 779,830.80

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Solution

The fourth proportional to 1,209,412.68, 1,668,431.08 and 779,830.80 is: 1,075,806.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,412.68 : 1,668,431.08 = 779,830.80 : x
  2. Step 2: Convert to fraction form
    1,209,412.68/1,668,431.08 = 779,830.80/x
  3. Step 3: Cross multiply
    1,209,412.68x = 1,668,431.08 × 779,830.80
  4. Step 4: Simplify right side
    1,209,412.68x = 1,301,093,943,861.26
  5. Step 5: Solve for x
    x = 1,301,093,943,861.26/1,209,412.68
  6. Step 6: Final answer
    x = 1,075,806.44

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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.