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Finding the Fourth Proportional to 661,146.36, 912,756.65 and 505,805.39

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Solution

The fourth proportional to 661,146.36, 912,756.65 and 505,805.39 is: 698,298.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,146.36 : 912,756.65 = 505,805.39 : x
  2. Step 2: Convert to fraction form
    661,146.36/912,756.65 = 505,805.39/x
  3. Step 3: Cross multiply
    661,146.36x = 912,756.65 × 505,805.39
  4. Step 4: Simplify right side
    661,146.36x = 461,677,233,081.21
  5. Step 5: Solve for x
    x = 461,677,233,081.21/661,146.36
  6. Step 6: Final answer
    x = 698,298.08

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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.