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Finding the Fourth Proportional to 393,315.60, 589,976.64 and 112,841.76

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Solution

The fourth proportional to 393,315.60, 589,976.64 and 112,841.76 is: 169,263.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,315.60 : 589,976.64 = 112,841.76 : x
  2. Step 2: Convert to fraction form
    393,315.60/589,976.64 = 112,841.76/x
  3. Step 3: Cross multiply
    393,315.60x = 589,976.64 × 112,841.76
  4. Step 4: Simplify right side
    393,315.60x = 66,574,002,416.49
  5. Step 5: Solve for x
    x = 66,574,002,416.49/393,315.60
  6. Step 6: Final answer
    x = 169,263.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.