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Finding the Fourth Proportional to 631,274.38, 871,123.35 and 359,408.68

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Solution

The fourth proportional to 631,274.38, 871,123.35 and 359,408.68 is: 495,963.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,274.38 : 871,123.35 = 359,408.68 : x
  2. Step 2: Convert to fraction form
    631,274.38/871,123.35 = 359,408.68/x
  3. Step 3: Cross multiply
    631,274.38x = 871,123.35 × 359,408.68
  4. Step 4: Simplify right side
    631,274.38x = 313,089,293,340.68
  5. Step 5: Solve for x
    x = 313,089,293,340.68/631,274.38
  6. Step 6: Final answer
    x = 495,963.88

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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.