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Finding the Fourth Proportional to 388,357.02, 535,898.54 and 216,261.98

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Solution

The fourth proportional to 388,357.02, 535,898.54 and 216,261.98 is: 298,422.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,357.02 : 535,898.54 = 216,261.98 : x
  2. Step 2: Convert to fraction form
    388,357.02/535,898.54 = 216,261.98/x
  3. Step 3: Cross multiply
    388,357.02x = 535,898.54 × 216,261.98
  4. Step 4: Simplify right side
    388,357.02x = 115,894,479,339.51
  5. Step 5: Solve for x
    x = 115,894,479,339.51/388,357.02
  6. Step 6: Final answer
    x = 298,422.52

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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.