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Finding the Fourth Proportional to 821,425.80, 1,232,354.70 and 260,459.40

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Solution

The fourth proportional to 821,425.80, 1,232,354.70 and 260,459.40 is: 390,757.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,425.80 : 1,232,354.70 = 260,459.40 : x
  2. Step 2: Convert to fraction form
    821,425.80/1,232,354.70 = 260,459.40/x
  3. Step 3: Cross multiply
    821,425.80x = 1,232,354.70 × 260,459.40
  4. Step 4: Simplify right side
    821,425.80x = 320,978,365,749.18
  5. Step 5: Solve for x
    x = 320,978,365,749.18/821,425.80
  6. Step 6: Final answer
    x = 390,757.59

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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.