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Finding the Fourth Proportional to 787,987, 1,181,980.50 and 197,011

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Solution

The fourth proportional to 787,987, 1,181,980.50 and 197,011 is: 295,516.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    787,987 : 1,181,980.50 = 197,011 : x
  2. Step 2: Convert to fraction form
    787,987/1,181,980.50 = 197,011/x
  3. Step 3: Cross multiply
    787,987x = 1,181,980.50 × 197,011
  4. Step 4: Simplify right side
    787,987x = 232,863,160,285.50
  5. Step 5: Solve for x
    x = 232,863,160,285.50/787,987
  6. Step 6: Final answer
    x = 295,516.50

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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.