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Finding the Fourth Proportional to 631,625.60, 871,632.76 and 345,139.08

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Solution

The fourth proportional to 631,625.60, 871,632.76 and 345,139.08 is: 476,286.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,625.60 : 871,632.76 = 345,139.08 : x
  2. Step 2: Convert to fraction form
    631,625.60/871,632.76 = 345,139.08/x
  3. Step 3: Cross multiply
    631,625.60x = 871,632.76 × 345,139.08
  4. Step 4: Simplify right side
    631,625.60x = 300,834,528,884.26
  5. Step 5: Solve for x
    x = 300,834,528,884.26/631,625.60
  6. Step 6: Final answer
    x = 476,286.16

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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.