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Finding the Fourth Proportional to 1,312,615, 1,811,409.42 and 709,003

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Solution

The fourth proportional to 1,312,615, 1,811,409.42 and 709,003 is: 978,424.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312,615 : 1,811,409.42 = 709,003 : x
  2. Step 2: Convert to fraction form
    1,312,615/1,811,409.42 = 709,003/x
  3. Step 3: Cross multiply
    1,312,615x = 1,811,409.42 × 709,003
  4. Step 4: Simplify right side
    1,312,615x = 1,284,294,713,008.26
  5. Step 5: Solve for x
    x = 1,284,294,713,008.26/1,312,615
  6. Step 6: Final answer
    x = 978,424.53

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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.