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Finding the Fourth Proportional to 388,356.01, 535,897.15 and 216,260.98

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Solution

The fourth proportional to 388,356.01, 535,897.15 and 216,260.98 is: 298,421.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,356.01 : 535,897.15 = 216,260.98 : x
  2. Step 2: Convert to fraction form
    388,356.01/535,897.15 = 216,260.98/x
  3. Step 3: Cross multiply
    388,356.01x = 535,897.15 × 216,260.98
  4. Step 4: Simplify right side
    388,356.01x = 115,893,642,838.21
  5. Step 5: Solve for x
    x = 115,893,642,838.21/388,356.01
  6. Step 6: Final answer
    x = 298,421.14

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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.