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Finding the Fourth Proportional to 391,703.57, 540,421.71 and 236,596.91

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Solution

The fourth proportional to 391,703.57, 540,421.71 and 236,596.91 is: 326,425.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,703.57 : 540,421.71 = 236,596.91 : x
  2. Step 2: Convert to fraction form
    391,703.57/540,421.71 = 236,596.91/x
  3. Step 3: Cross multiply
    391,703.57x = 540,421.71 × 236,596.91
  4. Step 4: Simplify right side
    391,703.57x = 127,862,104,910.06
  5. Step 5: Solve for x
    x = 127,862,104,910.06/391,703.57
  6. Step 6: Final answer
    x = 326,425.68

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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.