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Finding the Fourth Proportional to 631,883.81, 947,825.72 and 211,159.69

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Solution

The fourth proportional to 631,883.81, 947,825.72 and 211,159.69 is: 316,739.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,883.81 : 947,825.72 = 211,159.69 : x
  2. Step 2: Convert to fraction form
    631,883.81/947,825.72 = 211,159.69/x
  3. Step 3: Cross multiply
    631,883.81x = 947,825.72 × 211,159.69
  4. Step 4: Simplify right side
    631,883.81x = 200,142,582,575.71
  5. Step 5: Solve for x
    x = 200,142,582,575.71/631,883.81
  6. Step 6: Final answer
    x = 316,739.53

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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.