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Finding the Fourth Proportional to 310,807.68, 428,912.64 and 176,671.68

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Solution

The fourth proportional to 310,807.68, 428,912.64 and 176,671.68 is: 243,805.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,807.68 : 428,912.64 = 176,671.68 : x
  2. Step 2: Convert to fraction form
    310,807.68/428,912.64 = 176,671.68/x
  3. Step 3: Cross multiply
    310,807.68x = 428,912.64 × 176,671.68
  4. Step 4: Simplify right side
    310,807.68x = 75,776,716,682.04
  5. Step 5: Solve for x
    x = 75,776,716,682.04/310,807.68
  6. Step 6: Final answer
    x = 243,805.81

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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.