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Finding the Fourth Proportional to 315,799.66, 435,806.58 and 172,559.68

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Solution

The fourth proportional to 315,799.66, 435,806.58 and 172,559.68 is: 238,134.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,799.66 : 435,806.58 = 172,559.68 : x
  2. Step 2: Convert to fraction form
    315,799.66/435,806.58 = 172,559.68/x
  3. Step 3: Cross multiply
    315,799.66x = 435,806.58 × 172,559.68
  4. Step 4: Simplify right side
    315,799.66x = 75,202,643,986.69
  5. Step 5: Solve for x
    x = 75,202,643,986.69/315,799.66
  6. Step 6: Final answer
    x = 238,134.02

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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.