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Finding the Fourth Proportional to 655,858.49, 905,063.36 and 401,209.65

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Solution

The fourth proportional to 655,858.49, 905,063.36 and 401,209.65 is: 553,656.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,858.49 : 905,063.36 = 401,209.65 : x
  2. Step 2: Convert to fraction form
    655,858.49/905,063.36 = 401,209.65/x
  3. Step 3: Cross multiply
    655,858.49x = 905,063.36 × 401,209.65
  4. Step 4: Simplify right side
    655,858.49x = 363,120,151,887.38
  5. Step 5: Solve for x
    x = 363,120,151,887.38/655,858.49
  6. Step 6: Final answer
    x = 553,656.25

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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.