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Finding the Fourth Proportional to 631,711.76, 871,822.34 and 345,274.90

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Solution

The fourth proportional to 631,711.76, 871,822.34 and 345,274.90 is: 476,512.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,711.76 : 871,822.34 = 345,274.90 : x
  2. Step 2: Convert to fraction form
    631,711.76/871,822.34 = 345,274.90/x
  3. Step 3: Cross multiply
    631,711.76x = 871,822.34 × 345,274.90
  4. Step 4: Simplify right side
    631,711.76x = 301,018,373,554.12
  5. Step 5: Solve for x
    x = 301,018,373,554.12/631,711.76
  6. Step 6: Final answer
    x = 476,512.22

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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.