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Finding the Fourth Proportional to 764,564.90, 1,146,810.90 and 259,076.30

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Solution

The fourth proportional to 764,564.90, 1,146,810.90 and 259,076.30 is: 388,602.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,564.90 : 1,146,810.90 = 259,076.30 : x
  2. Step 2: Convert to fraction form
    764,564.90/1,146,810.90 = 259,076.30/x
  3. Step 3: Cross multiply
    764,564.90x = 1,146,810.90 × 259,076.30
  4. Step 4: Simplify right side
    764,564.90x = 297,111,524,771.67
  5. Step 5: Solve for x
    x = 297,111,524,771.67/764,564.90
  6. Step 6: Final answer
    x = 388,602.10

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Double scale
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Similar ratio
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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.