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Finding the Fourth Proportional to 389,763.12, 538,244.53 and 368,535.45

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Solution

The fourth proportional to 389,763.12, 538,244.53 and 368,535.45 is: 508,930.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,763.12 : 538,244.53 = 368,535.45 : x
  2. Step 2: Convert to fraction form
    389,763.12/538,244.53 = 368,535.45/x
  3. Step 3: Cross multiply
    389,763.12x = 538,244.53 × 368,535.45
  4. Step 4: Simplify right side
    389,763.12x = 198,362,191,170.67
  5. Step 5: Solve for x
    x = 198,362,191,170.67/389,763.12
  6. Step 6: Final answer
    x = 508,930.11

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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.