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Finding the Fourth Proportional to 572,726.46, 790,364.36 and 318,077.64

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Solution

The fourth proportional to 572,726.46, 790,364.36 and 318,077.64 is: 438,948.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,726.46 : 790,364.36 = 318,077.64 : x
  2. Step 2: Convert to fraction form
    572,726.46/790,364.36 = 318,077.64/x
  3. Step 3: Cross multiply
    572,726.46x = 790,364.36 × 318,077.64
  4. Step 4: Simplify right side
    572,726.46x = 251,397,228,778.52
  5. Step 5: Solve for x
    x = 251,397,228,778.52/572,726.46
  6. Step 6: Final answer
    x = 438,948.17

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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.