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Finding the Fourth Proportional to 391,358.40, 586,600.20 and 166,680.60

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Solution

The fourth proportional to 391,358.40, 586,600.20 and 166,680.60 is: 249,834.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,358.40 : 586,600.20 = 166,680.60 : x
  2. Step 2: Convert to fraction form
    391,358.40/586,600.20 = 166,680.60/x
  3. Step 3: Cross multiply
    391,358.40x = 586,600.20 × 166,680.60
  4. Step 4: Simplify right side
    391,358.40x = 97,774,873,296.12
  5. Step 5: Solve for x
    x = 97,774,873,296.12/391,358.40
  6. Step 6: Final answer
    x = 249,834.61

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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.