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Finding the Fourth Proportional to 815,858.40, 1,221,368.40 and 606,424.80

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Solution

The fourth proportional to 815,858.40, 1,221,368.40 and 606,424.80 is: 907,839.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,858.40 : 1,221,368.40 = 606,424.80 : x
  2. Step 2: Convert to fraction form
    815,858.40/1,221,368.40 = 606,424.80/x
  3. Step 3: Cross multiply
    815,858.40x = 1,221,368.40 × 606,424.80
  4. Step 4: Simplify right side
    815,858.40x = 740,668,087,696.32
  5. Step 5: Solve for x
    x = 740,668,087,696.32/815,858.40
  6. Step 6: Final answer
    x = 907,839.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.