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Finding the Fourth Proportional to 388,963.44, 583,548.88 and 139,647.60

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Solution

The fourth proportional to 388,963.44, 583,548.88 and 139,647.60 is: 209,508.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,963.44 : 583,548.88 = 139,647.60 : x
  2. Step 2: Convert to fraction form
    388,963.44/583,548.88 = 139,647.60/x
  3. Step 3: Cross multiply
    388,963.44x = 583,548.88 × 139,647.60
  4. Step 4: Simplify right side
    388,963.44x = 81,491,200,574.69
  5. Step 5: Solve for x
    x = 81,491,200,574.69/388,963.44
  6. Step 6: Final answer
    x = 209,508.64

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1.5x scale

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.