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Finding the Fourth Proportional to 631,768.84, 871,827.42 and 356,124.76

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Solution

The fourth proportional to 631,768.84, 871,827.42 and 356,124.76 is: 491,444.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,768.84 : 871,827.42 = 356,124.76 : x
  2. Step 2: Convert to fraction form
    631,768.84/871,827.42 = 356,124.76/x
  3. Step 3: Cross multiply
    631,768.84x = 871,827.42 × 356,124.76
  4. Step 4: Simplify right side
    631,768.84x = 310,479,330,708.92
  5. Step 5: Solve for x
    x = 310,479,330,708.92/631,768.84
  6. Step 6: Final answer
    x = 491,444.51

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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.