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Finding the Fourth Proportional to 1,312,620, 1,811,416.32 and 709,008

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Solution

The fourth proportional to 1,312,620, 1,811,416.32 and 709,008 is: 978,431.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312,620 : 1,811,416.32 = 709,008 : x
  2. Step 2: Convert to fraction form
    1,312,620/1,811,416.32 = 709,008/x
  3. Step 3: Cross multiply
    1,312,620x = 1,811,416.32 × 709,008
  4. Step 4: Simplify right side
    1,312,620x = 1,284,308,662,210.56
  5. Step 5: Solve for x
    x = 1,284,308,662,210.56/1,312,620
  6. Step 6: Final answer
    x = 978,431.43

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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.