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Finding the Fourth Proportional to 315,779.21, 435,770.17 and 172,536.18

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Solution

The fourth proportional to 315,779.21, 435,770.17 and 172,536.18 is: 238,097.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,779.21 : 435,770.17 = 172,536.18 : x
  2. Step 2: Convert to fraction form
    315,779.21/435,770.17 = 172,536.18/x
  3. Step 3: Cross multiply
    315,779.21x = 435,770.17 × 172,536.18
  4. Step 4: Simplify right side
    315,779.21x = 75,186,120,489.75
  5. Step 5: Solve for x
    x = 75,186,120,489.75/315,779.21
  6. Step 6: Final answer
    x = 238,097.12

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1.5x scale

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.