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Finding the Fourth Proportional to 388,117.56, 535,602.13 and 216,031.81

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Solution

The fourth proportional to 388,117.56, 535,602.13 and 216,031.81 is: 298,123.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,117.56 : 535,602.13 = 216,031.81 : x
  2. Step 2: Convert to fraction form
    388,117.56/535,602.13 = 216,031.81/x
  3. Step 3: Cross multiply
    388,117.56x = 535,602.13 × 216,031.81
  4. Step 4: Simplify right side
    388,117.56x = 115,707,097,583.76
  5. Step 5: Solve for x
    x = 115,707,097,583.76/388,117.56
  6. Step 6: Final answer
    x = 298,123.84

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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.