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Finding the Fourth Proportional to 680,809.94, 939,480.50 and 374,828.21

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Solution

The fourth proportional to 680,809.94, 939,480.50 and 374,828.21 is: 517,242.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,809.94 : 939,480.50 = 374,828.21 : x
  2. Step 2: Convert to fraction form
    680,809.94/939,480.50 = 374,828.21/x
  3. Step 3: Cross multiply
    680,809.94x = 939,480.50 × 374,828.21
  4. Step 4: Simplify right side
    680,809.94x = 352,143,797,430.68
  5. Step 5: Solve for x
    x = 352,143,797,430.68/680,809.94
  6. Step 6: Final answer
    x = 517,242.45

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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.