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Finding the Fourth Proportional to 631,769.84, 871,828.80 and 356,125.76

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Solution

The fourth proportional to 631,769.84, 871,828.80 and 356,125.76 is: 491,445.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,769.84 : 871,828.80 = 356,125.76 : x
  2. Step 2: Convert to fraction form
    631,769.84/871,828.80 = 356,125.76/x
  3. Step 3: Cross multiply
    631,769.84x = 871,828.80 × 356,125.76
  4. Step 4: Simplify right side
    631,769.84x = 310,480,693,989.89
  5. Step 5: Solve for x
    x = 310,480,693,989.89/631,769.84
  6. Step 6: Final answer
    x = 491,445.89

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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.