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Finding the Fourth Proportional to 572,963.12, 789,867.96 and 402,668.72

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Solution

The fourth proportional to 572,963.12, 789,867.96 and 402,668.72 is: 555,105.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,963.12 : 789,867.96 = 402,668.72 : x
  2. Step 2: Convert to fraction form
    572,963.12/789,867.96 = 402,668.72/x
  3. Step 3: Cross multiply
    572,963.12x = 789,867.96 × 402,668.72
  4. Step 4: Simplify right side
    572,963.12x = 318,055,120,422.21
  5. Step 5: Solve for x
    x = 318,055,120,422.21/572,963.12
  6. Step 6: Final answer
    x = 555,105.75

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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.