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Finding the Fourth Proportional to 391,359.40, 586,601.70 and 166,681.60

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Solution

The fourth proportional to 391,359.40, 586,601.70 and 166,681.60 is: 249,836.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,359.40 : 586,601.70 = 166,681.60 : x
  2. Step 2: Convert to fraction form
    391,359.40/586,601.70 = 166,681.60/x
  3. Step 3: Cross multiply
    391,359.40x = 586,601.70 × 166,681.60
  4. Step 4: Simplify right side
    391,359.40x = 97,775,709,918.72
  5. Step 5: Solve for x
    x = 97,775,709,918.72/391,359.40
  6. Step 6: Final answer
    x = 249,836.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.