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Finding the Fourth Proportional to 572,728.21, 790,366.77 and 318,079.39

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Solution

The fourth proportional to 572,728.21, 790,366.77 and 318,079.39 is: 438,950.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,728.21 : 790,366.77 = 318,079.39 : x
  2. Step 2: Convert to fraction form
    572,728.21/790,366.77 = 318,079.39/x
  3. Step 3: Cross multiply
    572,728.21x = 790,366.77 × 318,079.39
  4. Step 4: Simplify right side
    572,728.21x = 251,399,380,077.87
  5. Step 5: Solve for x
    x = 251,399,380,077.87/572,728.21
  6. Step 6: Final answer
    x = 438,950.58

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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.