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Finding the Fourth Proportional to 439,640.46, 606,707.91 and 258,356.34

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Solution

The fourth proportional to 439,640.46, 606,707.91 and 258,356.34 is: 356,534.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,640.46 : 606,707.91 = 258,356.34 : x
  2. Step 2: Convert to fraction form
    439,640.46/606,707.91 = 258,356.34/x
  3. Step 3: Cross multiply
    439,640.46x = 606,707.91 × 258,356.34
  4. Step 4: Simplify right side
    439,640.46x = 156,746,835,076.65
  5. Step 5: Solve for x
    x = 156,746,835,076.65/439,640.46
  6. Step 6: Final answer
    x = 356,534.14

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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.