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Finding the Fourth Proportional to 393,038.40, 589,634.40 and 156,340.80

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Solution

The fourth proportional to 393,038.40, 589,634.40 and 156,340.80 is: 234,541.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,038.40 : 589,634.40 = 156,340.80 : x
  2. Step 2: Convert to fraction form
    393,038.40/589,634.40 = 156,340.80/x
  3. Step 3: Cross multiply
    393,038.40x = 589,634.40 × 156,340.80
  4. Step 4: Simplify right side
    393,038.40x = 92,183,913,803.52
  5. Step 5: Solve for x
    x = 92,183,913,803.52/393,038.40
  6. Step 6: Final answer
    x = 234,541.75

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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.