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Finding the Fourth Proportional to 509,478.60, 764,193.60 and 172,486.20

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Solution

The fourth proportional to 509,478.60, 764,193.60 and 172,486.20 is: 258,721.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,478.60 : 764,193.60 = 172,486.20 : x
  2. Step 2: Convert to fraction form
    509,478.60/764,193.60 = 172,486.20/x
  3. Step 3: Cross multiply
    509,478.60x = 764,193.60 × 172,486.20
  4. Step 4: Simplify right side
    509,478.60x = 131,812,850,128.32
  5. Step 5: Solve for x
    x = 131,812,850,128.32/509,478.60
  6. Step 6: Final answer
    x = 258,721.07

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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.