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Finding the Fourth Proportional to 690,768.30, 953,258.85 and 404,342.58

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Solution

The fourth proportional to 690,768.30, 953,258.85 and 404,342.58 is: 557,991.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,768.30 : 953,258.85 = 404,342.58 : x
  2. Step 2: Convert to fraction form
    690,768.30/953,258.85 = 404,342.58/x
  3. Step 3: Cross multiply
    690,768.30x = 953,258.85 × 404,342.58
  4. Step 4: Simplify right side
    690,768.30x = 385,443,142,816.83
  5. Step 5: Solve for x
    x = 385,443,142,816.83/690,768.30
  6. Step 6: Final answer
    x = 557,991.94

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1.5x scale

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.