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Finding the Fourth Proportional to 291,059.80, 435,714.90 and 172,670.20

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Solution

The fourth proportional to 291,059.80, 435,714.90 and 172,670.20 is: 258,486.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,059.80 : 435,714.90 = 172,670.20 : x
  2. Step 2: Convert to fraction form
    291,059.80/435,714.90 = 172,670.20/x
  3. Step 3: Cross multiply
    291,059.80x = 435,714.90 × 172,670.20
  4. Step 4: Simplify right side
    291,059.80x = 75,234,978,925.98
  5. Step 5: Solve for x
    x = 75,234,978,925.98/291,059.80
  6. Step 6: Final answer
    x = 258,486.33

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1.5x scale

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.