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Finding the Fourth Proportional to 631,212.36, 871,078.62 and 359,297.76

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Solution

The fourth proportional to 631,212.36, 871,078.62 and 359,297.76 is: 495,834.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,212.36 : 871,078.62 = 359,297.76 : x
  2. Step 2: Convert to fraction form
    631,212.36/871,078.62 = 359,297.76/x
  3. Step 3: Cross multiply
    631,212.36x = 871,078.62 × 359,297.76
  4. Step 4: Simplify right side
    631,212.36x = 312,976,596,949.89
  5. Step 5: Solve for x
    x = 312,976,596,949.89/631,212.36
  6. Step 6: Final answer
    x = 495,834.08

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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.