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Finding the Fourth Proportional to 388,665.64, 532,862.57 and 381,580.84

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Solution

The fourth proportional to 388,665.64, 532,862.57 and 381,580.84 is: 523,149.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,665.64 : 532,862.57 = 381,580.84 : x
  2. Step 2: Convert to fraction form
    388,665.64/532,862.57 = 381,580.84/x
  3. Step 3: Cross multiply
    388,665.64x = 532,862.57 × 381,580.84
  4. Step 4: Simplify right side
    388,665.64x = 203,330,147,065.16
  5. Step 5: Solve for x
    x = 203,330,147,065.16/388,665.64
  6. Step 6: Final answer
    x = 523,149.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.