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Finding the Fourth Proportional to 318,993.52, 478,564.40 and 108,633.28

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Solution

The fourth proportional to 318,993.52, 478,564.40 and 108,633.28 is: 162,975.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,993.52 : 478,564.40 = 108,633.28 : x
  2. Step 2: Convert to fraction form
    318,993.52/478,564.40 = 108,633.28/x
  3. Step 3: Cross multiply
    318,993.52x = 478,564.40 × 108,633.28
  4. Step 4: Simplify right side
    318,993.52x = 51,988,020,463.23
  5. Step 5: Solve for x
    x = 51,988,020,463.23/318,993.52
  6. Step 6: Final answer
    x = 162,975.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.