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Finding the Fourth Proportional to 388,434.52, 536,049.66 and 218,674.72

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Solution

The fourth proportional to 388,434.52, 536,049.66 and 218,674.72 is: 301,776.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,434.52 : 536,049.66 = 218,674.72 : x
  2. Step 2: Convert to fraction form
    388,434.52/536,049.66 = 218,674.72/x
  3. Step 3: Cross multiply
    388,434.52x = 536,049.66 × 218,674.72
  4. Step 4: Simplify right side
    388,434.52x = 117,220,509,306.60
  5. Step 5: Solve for x
    x = 117,220,509,306.60/388,434.52
  6. Step 6: Final answer
    x = 301,776.76

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1.5x scale

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.