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Finding the Fourth Proportional to 358,923.80, 538,385.70 and 218,955.80

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Solution

The fourth proportional to 358,923.80, 538,385.70 and 218,955.80 is: 328,433.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,923.80 : 538,385.70 = 218,955.80 : x
  2. Step 2: Convert to fraction form
    358,923.80/538,385.70 = 218,955.80/x
  3. Step 3: Cross multiply
    358,923.80x = 538,385.70 × 218,955.80
  4. Step 4: Simplify right side
    358,923.80x = 117,882,671,652.06
  5. Step 5: Solve for x
    x = 117,882,671,652.06/358,923.80
  6. Step 6: Final answer
    x = 328,433.70

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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.