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Finding the Fourth Proportional to 631,703.21, 871,750.76 and 345,223.25

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Solution

The fourth proportional to 631,703.21, 871,750.76 and 345,223.25 is: 476,408.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,703.21 : 871,750.76 = 345,223.25 : x
  2. Step 2: Convert to fraction form
    631,703.21/871,750.76 = 345,223.25/x
  3. Step 3: Cross multiply
    631,703.21x = 871,750.76 × 345,223.25
  4. Step 4: Simplify right side
    631,703.21x = 300,948,627,741.37
  5. Step 5: Solve for x
    x = 300,948,627,741.37/631,703.21
  6. Step 6: Final answer
    x = 476,408.26

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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.