Home / 315,899.68-435,953.28-172,669.36

Finding the Fourth Proportional to 315,899.68, 435,953.28 and 172,669.36

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Solution

The fourth proportional to 315,899.68, 435,953.28 and 172,669.36 is: 238,290.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,899.68 : 435,953.28 = 172,669.36 : x
  2. Step 2: Convert to fraction form
    315,899.68/435,953.28 = 172,669.36/x
  3. Step 3: Cross multiply
    315,899.68x = 435,953.28 × 172,669.36
  4. Step 4: Simplify right side
    315,899.68x = 75,275,773,847.50
  5. Step 5: Solve for x
    x = 75,275,773,847.50/315,899.68
  6. Step 6: Final answer
    x = 238,290.12

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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.