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Finding the Fourth Proportional to 368,905.29, 508,017.33 and 320,485.11

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Solution

The fourth proportional to 368,905.29, 508,017.33 and 320,485.11 is: 441,338.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,905.29 : 508,017.33 = 320,485.11 : x
  2. Step 2: Convert to fraction form
    368,905.29/508,017.33 = 320,485.11/x
  3. Step 3: Cross multiply
    368,905.29x = 508,017.33 × 320,485.11
  4. Step 4: Simplify right side
    368,905.29x = 162,811,989,886.96
  5. Step 5: Solve for x
    x = 162,811,989,886.96/368,905.29
  6. Step 6: Final answer
    x = 441,338.18

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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.