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Finding the Fourth Proportional to 393,316.60, 589,978.14 and 112,842.76

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Solution

The fourth proportional to 393,316.60, 589,978.14 and 112,842.76 is: 169,265.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,316.60 : 589,978.14 = 112,842.76 : x
  2. Step 2: Convert to fraction form
    393,316.60/589,978.14 = 112,842.76/x
  3. Step 3: Cross multiply
    393,316.60x = 589,978.14 × 112,842.76
  4. Step 4: Simplify right side
    393,316.60x = 66,574,761,657.27
  5. Step 5: Solve for x
    x = 66,574,761,657.27/393,316.60
  6. Step 6: Final answer
    x = 169,265.07

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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.