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Finding the Fourth Proportional to 388,366.92, 535,818.18 and 316,623.60

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Solution

The fourth proportional to 388,366.92, 535,818.18 and 316,623.60 is: 436,836.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,366.92 : 535,818.18 = 316,623.60 : x
  2. Step 2: Convert to fraction form
    388,366.92/535,818.18 = 316,623.60/x
  3. Step 3: Cross multiply
    388,366.92x = 535,818.18 × 316,623.60
  4. Step 4: Simplify right side
    388,366.92x = 169,652,681,097.05
  5. Step 5: Solve for x
    x = 169,652,681,097.05/388,366.92
  6. Step 6: Final answer
    x = 436,836.08

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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.