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Finding the Fourth Proportional to 567,421.20, 783,028.62 and 312,771.78

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Solution

The fourth proportional to 567,421.20, 783,028.62 and 312,771.78 is: 431,618.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    567,421.20 : 783,028.62 = 312,771.78 : x
  2. Step 2: Convert to fraction form
    567,421.20/783,028.62 = 312,771.78/x
  3. Step 3: Cross multiply
    567,421.20x = 783,028.62 × 312,771.78
  4. Step 4: Simplify right side
    567,421.20x = 244,909,255,268.34
  5. Step 5: Solve for x
    x = 244,909,255,268.34/567,421.20
  6. Step 6: Final answer
    x = 431,618.09

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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.