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Finding the Fourth Proportional to 631,643.86, 871,663.44 and 345,158.74

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Solution

The fourth proportional to 631,643.86, 871,663.44 and 345,158.74 is: 476,316.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,643.86 : 871,663.44 = 345,158.74 : x
  2. Step 2: Convert to fraction form
    631,643.86/871,663.44 = 345,158.74/x
  3. Step 3: Cross multiply
    631,643.86x = 871,663.44 × 345,158.74
  4. Step 4: Simplify right side
    631,643.86x = 300,862,254,654.47
  5. Step 5: Solve for x
    x = 300,862,254,654.47/631,643.86
  6. Step 6: Final answer
    x = 476,316.28

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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.