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Finding the Fourth Proportional to 631,796.36, 947,111.34 and 315,978.44

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Solution

The fourth proportional to 631,796.36, 947,111.34 and 315,978.44 is: 473,675.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,796.36 : 947,111.34 = 315,978.44 : x
  2. Step 2: Convert to fraction form
    631,796.36/947,111.34 = 315,978.44/x
  3. Step 3: Cross multiply
    631,796.36x = 947,111.34 × 315,978.44
  4. Step 4: Simplify right side
    631,796.36x = 299,266,763,719.51
  5. Step 5: Solve for x
    x = 299,266,763,719.51/631,796.36
  6. Step 6: Final answer
    x = 473,675.99

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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.