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Finding the Fourth Proportional to 572,768.30, 790,398.45 and 318,135.86

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Solution

The fourth proportional to 572,768.30, 790,398.45 and 318,135.86 is: 439,015.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,768.30 : 790,398.45 = 318,135.86 : x
  2. Step 2: Convert to fraction form
    572,768.30/790,398.45 = 318,135.86/x
  3. Step 3: Cross multiply
    572,768.30x = 790,398.45 × 318,135.86
  4. Step 4: Simplify right side
    572,768.30x = 251,454,090,633.42
  5. Step 5: Solve for x
    x = 251,454,090,633.42/572,768.30
  6. Step 6: Final answer
    x = 439,015.38

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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.