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Finding the Fourth Proportional to 656,869.25, 906,479.17 and 355,063.25

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Solution

The fourth proportional to 656,869.25, 906,479.17 and 355,063.25 is: 489,987.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,869.25 : 906,479.17 = 355,063.25 : x
  2. Step 2: Convert to fraction form
    656,869.25/906,479.17 = 355,063.25/x
  3. Step 3: Cross multiply
    656,869.25x = 906,479.17 × 355,063.25
  4. Step 4: Simplify right side
    656,869.25x = 321,857,441,536.04
  5. Step 5: Solve for x
    x = 321,857,441,536.04/656,869.25
  6. Step 6: Final answer
    x = 489,987.07

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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.