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Finding the Fourth Proportional to 631,407.70, 871,331.64 and 344,920.42

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Solution

The fourth proportional to 631,407.70, 871,331.64 and 344,920.42 is: 475,984.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,407.70 : 871,331.64 = 344,920.42 : x
  2. Step 2: Convert to fraction form
    631,407.70/871,331.64 = 344,920.42/x
  3. Step 3: Cross multiply
    631,407.70x = 871,331.64 × 344,920.42
  4. Step 4: Simplify right side
    631,407.70x = 300,540,075,228.09
  5. Step 5: Solve for x
    x = 300,540,075,228.09/631,407.70
  6. Step 6: Final answer
    x = 475,984.18

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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.