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Finding the Fourth Proportional to 631,761.28, 871,828.46 and 345,281.28

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Solution

The fourth proportional to 631,761.28, 871,828.46 and 345,281.28 is: 476,487.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,761.28 : 871,828.46 = 345,281.28 : x
  2. Step 2: Convert to fraction form
    631,761.28/871,828.46 = 345,281.28/x
  3. Step 3: Cross multiply
    631,761.28x = 871,828.46 × 345,281.28
  4. Step 4: Simplify right side
    631,761.28x = 301,026,046,609.23
  5. Step 5: Solve for x
    x = 301,026,046,609.23/631,761.28
  6. Step 6: Final answer
    x = 476,487.02

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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.