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Finding the Fourth Proportional to 646,590.40, 969,885.60 and 197,310.40

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Solution

The fourth proportional to 646,590.40, 969,885.60 and 197,310.40 is: 295,965.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,590.40 : 969,885.60 = 197,310.40 : x
  2. Step 2: Convert to fraction form
    646,590.40/969,885.60 = 197,310.40/x
  3. Step 3: Cross multiply
    646,590.40x = 969,885.60 × 197,310.40
  4. Step 4: Simplify right side
    646,590.40x = 191,368,515,690.24
  5. Step 5: Solve for x
    x = 191,368,515,690.24/646,590.40
  6. Step 6: Final answer
    x = 295,965.60

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Half scale
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Double scale
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Similar ratio
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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.