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Finding the Fourth Proportional to 690,864.93, 953,395.56 and 400,532.94

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Solution

The fourth proportional to 690,864.93, 953,395.56 and 400,532.94 is: 552,736.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,864.93 : 953,395.56 = 400,532.94 : x
  2. Step 2: Convert to fraction form
    690,864.93/953,395.56 = 400,532.94/x
  3. Step 3: Cross multiply
    690,864.93x = 953,395.56 × 400,532.94
  4. Step 4: Simplify right side
    690,864.93x = 381,866,326,629.75
  5. Step 5: Solve for x
    x = 381,866,326,629.75/690,864.93
  6. Step 6: Final answer
    x = 552,736.59

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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.