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Finding the Fourth Proportional to 572,727.21, 790,365.39 and 318,078.39

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Solution

The fourth proportional to 572,727.21, 790,365.39 and 318,078.39 is: 438,949.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,727.21 : 790,365.39 = 318,078.39 : x
  2. Step 2: Convert to fraction form
    572,727.21/790,365.39 = 318,078.39/x
  3. Step 3: Cross multiply
    572,727.21x = 790,365.39 × 318,078.39
  4. Step 4: Simplify right side
    572,727.21x = 251,398,150,762.92
  5. Step 5: Solve for x
    x = 251,398,150,762.92/572,727.21
  6. Step 6: Final answer
    x = 438,949.20

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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.