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Finding the Fourth Proportional to 1,312,656, 1,811,466 and 709,044

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Solution

The fourth proportional to 1,312,656, 1,811,466 and 709,044 is: 978,481.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312,656 : 1,811,466 = 709,044 : x
  2. Step 2: Convert to fraction form
    1,312,656/1,811,466 = 709,044/x
  3. Step 3: Cross multiply
    1,312,656x = 1,811,466 × 709,044
  4. Step 4: Simplify right side
    1,312,656x = 1,284,409,098,504
  5. Step 5: Solve for x
    x = 1,284,409,098,504/1,312,656
  6. Step 6: Final answer
    x = 978,481.11

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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.