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Finding the Fourth Proportional to 631,356.40, 871,292.76 and 344,903.20

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Solution

The fourth proportional to 631,356.40, 871,292.76 and 344,903.20 is: 475,977.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,356.40 : 871,292.76 = 344,903.20 : x
  2. Step 2: Convert to fraction form
    631,356.40/871,292.76 = 344,903.20/x
  3. Step 3: Cross multiply
    631,356.40x = 871,292.76 × 344,903.20
  4. Step 4: Simplify right side
    631,356.40x = 300,511,661,060.83
  5. Step 5: Solve for x
    x = 300,511,661,060.83/631,356.40
  6. Step 6: Final answer
    x = 475,977.85

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Double scale
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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.