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Finding the Fourth Proportional to 378,252.40, 521,979.08 and 208,482.80

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Solution

The fourth proportional to 378,252.40, 521,979.08 and 208,482.80 is: 287,701.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,252.40 : 521,979.08 = 208,482.80 : x
  2. Step 2: Convert to fraction form
    378,252.40/521,979.08 = 208,482.80/x
  3. Step 3: Cross multiply
    378,252.40x = 521,979.08 × 208,482.80
  4. Step 4: Simplify right side
    378,252.40x = 108,823,660,139.82
  5. Step 5: Solve for x
    x = 108,823,660,139.82/378,252.40
  6. Step 6: Final answer
    x = 287,701.18

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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.