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Finding the Fourth Proportional to 631,742.96, 871,806.84 and 345,266.48

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Solution

The fourth proportional to 631,742.96, 871,806.84 and 345,266.48 is: 476,468.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,742.96 : 871,806.84 = 345,266.48 : x
  2. Step 2: Convert to fraction form
    631,742.96/871,806.84 = 345,266.48/x
  3. Step 3: Cross multiply
    631,742.96x = 871,806.84 × 345,266.48
  4. Step 4: Simplify right side
    631,742.96x = 301,005,678,886.72
  5. Step 5: Solve for x
    x = 301,005,678,886.72/631,742.96
  6. Step 6: Final answer
    x = 476,468.59

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.