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Finding the Fourth Proportional to 391,124.30, 539,806.21 and 282,579.93

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Solution

The fourth proportional to 391,124.30, 539,806.21 and 282,579.93 is: 389,999.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,124.30 : 539,806.21 = 282,579.93 : x
  2. Step 2: Convert to fraction form
    391,124.30/539,806.21 = 282,579.93/x
  3. Step 3: Cross multiply
    391,124.30x = 539,806.21 × 282,579.93
  4. Step 4: Simplify right side
    391,124.30x = 152,538,400,328.92
  5. Step 5: Solve for x
    x = 152,538,400,328.92/391,124.30
  6. Step 6: Final answer
    x = 389,999.81

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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.