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Finding the Fourth Proportional to 631,367.51, 871,230.01 and 355,770.23

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Solution

The fourth proportional to 631,367.51, 871,230.01 and 355,770.23 is: 490,930.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,367.51 : 871,230.01 = 355,770.23 : x
  2. Step 2: Convert to fraction form
    631,367.51/871,230.01 = 355,770.23/x
  3. Step 3: Cross multiply
    631,367.51x = 871,230.01 × 355,770.23
  4. Step 4: Simplify right side
    631,367.51x = 309,957,703,878.17
  5. Step 5: Solve for x
    x = 309,957,703,878.17/631,367.51
  6. Step 6: Final answer
    x = 490,930.71

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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.