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Finding the Fourth Proportional to 393,348.66, 589,860.32 and 123,386.75

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Solution

The fourth proportional to 393,348.66, 589,860.32 and 123,386.75 is: 185,029.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,348.66 : 589,860.32 = 123,386.75 : x
  2. Step 2: Convert to fraction form
    393,348.66/589,860.32 = 123,386.75/x
  3. Step 3: Cross multiply
    393,348.66x = 589,860.32 × 123,386.75
  4. Step 4: Simplify right side
    393,348.66x = 72,780,947,838.76
  5. Step 5: Solve for x
    x = 72,780,947,838.76/393,348.66
  6. Step 6: Final answer
    x = 185,029.10

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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.