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Finding the Fourth Proportional to 388,252.32, 535,787.12 and 218,486.46

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Solution

The fourth proportional to 388,252.32, 535,787.12 and 218,486.46 is: 301,510.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,252.32 : 535,787.12 = 218,486.46 : x
  2. Step 2: Convert to fraction form
    388,252.32/535,787.12 = 218,486.46/x
  3. Step 3: Cross multiply
    388,252.32x = 535,787.12 × 218,486.46
  4. Step 4: Simplify right side
    388,252.32x = 117,062,231,162.40
  5. Step 5: Solve for x
    x = 117,062,231,162.40/388,252.32
  6. Step 6: Final answer
    x = 301,510.71

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1.5x scale

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.