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Finding the Fourth Proportional to 660,879.12, 991,319.63 and 162,243.12

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Solution

The fourth proportional to 660,879.12, 991,319.63 and 162,243.12 is: 243,364.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,879.12 : 991,319.63 = 162,243.12 : x
  2. Step 2: Convert to fraction form
    660,879.12/991,319.63 = 162,243.12/x
  3. Step 3: Cross multiply
    660,879.12x = 991,319.63 × 162,243.12
  4. Step 4: Simplify right side
    660,879.12x = 160,834,789,688.45
  5. Step 5: Solve for x
    x = 160,834,789,688.45/660,879.12
  6. Step 6: Final answer
    x = 243,364.91

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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.