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Finding the Fourth Proportional to 572,757.21, 790,393.55 and 318,099.69

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Solution

The fourth proportional to 572,757.21, 790,393.55 and 318,099.69 is: 438,971.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,757.21 : 790,393.55 = 318,099.69 : x
  2. Step 2: Convert to fraction form
    572,757.21/790,393.55 = 318,099.69/x
  3. Step 3: Cross multiply
    572,757.21x = 790,393.55 × 318,099.69
  4. Step 4: Simplify right side
    572,757.21x = 251,423,941,642.50
  5. Step 5: Solve for x
    x = 251,423,941,642.50/572,757.21
  6. Step 6: Final answer
    x = 438,971.24

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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.