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Finding the Fourth Proportional to 631,318.40, 871,240.32 and 344,865.20

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Solution

The fourth proportional to 631,318.40, 871,240.32 and 344,865.20 is: 475,925.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,318.40 : 871,240.32 = 344,865.20 : x
  2. Step 2: Convert to fraction form
    631,318.40/871,240.32 = 344,865.20/x
  3. Step 3: Cross multiply
    631,318.40x = 871,240.32 × 344,865.20
  4. Step 4: Simplify right side
    631,318.40x = 300,460,467,204.86
  5. Step 5: Solve for x
    x = 300,460,467,204.86/631,318.40
  6. Step 6: Final answer
    x = 475,925.41

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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.