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Finding the Fourth Proportional to 353,616.31, 487,950.54 and 208,412.65

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Solution

The fourth proportional to 353,616.31, 487,950.54 and 208,412.65 is: 287,585.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,616.31 : 487,950.54 = 208,412.65 : x
  2. Step 2: Convert to fraction form
    353,616.31/487,950.54 = 208,412.65/x
  3. Step 3: Cross multiply
    353,616.31x = 487,950.54 × 208,412.65
  4. Step 4: Simplify right side
    353,616.31x = 101,695,065,110.33
  5. Step 5: Solve for x
    x = 101,695,065,110.33/353,616.31
  6. Step 6: Final answer
    x = 287,585.90

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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.