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Finding the Fourth Proportional to 388,064.70, 535,528.53 and 218,298.83

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Solution

The fourth proportional to 388,064.70, 535,528.53 and 218,298.83 is: 301,251.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,064.70 : 535,528.53 = 218,298.83 : x
  2. Step 2: Convert to fraction form
    388,064.70/535,528.53 = 218,298.83/x
  3. Step 3: Cross multiply
    388,064.70x = 535,528.53 × 218,298.83
  4. Step 4: Simplify right side
    388,064.70x = 116,905,248,852.98
  5. Step 5: Solve for x
    x = 116,905,248,852.98/388,064.70
  6. Step 6: Final answer
    x = 301,251.95

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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.