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Finding the Fourth Proportional to 358,949.80, 538,424.70 and 218,981.80

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Solution

The fourth proportional to 358,949.80, 538,424.70 and 218,981.80 is: 328,472.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,949.80 : 538,424.70 = 218,981.80 : x
  2. Step 2: Convert to fraction form
    358,949.80/538,424.70 = 218,981.80/x
  3. Step 3: Cross multiply
    358,949.80x = 538,424.70 × 218,981.80
  4. Step 4: Simplify right side
    358,949.80x = 117,905,209,970.46
  5. Step 5: Solve for x
    x = 117,905,209,970.46/358,949.80
  6. Step 6: Final answer
    x = 328,472.70

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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.