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Finding the Fourth Proportional to 396,071.60, 546,435.20 and 260,178.72

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Solution

The fourth proportional to 396,071.60, 546,435.20 and 260,178.72 is: 358,952.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,071.60 : 546,435.20 = 260,178.72 : x
  2. Step 2: Convert to fraction form
    396,071.60/546,435.20 = 260,178.72/x
  3. Step 3: Cross multiply
    396,071.60x = 546,435.20 × 260,178.72
  4. Step 4: Simplify right side
    396,071.60x = 142,170,810,898.94
  5. Step 5: Solve for x
    x = 142,170,810,898.94/396,071.60
  6. Step 6: Final answer
    x = 358,952.30

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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.