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Finding the Fourth Proportional to 391,840.04, 540,238.64 and 253,775.04

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Solution

The fourth proportional to 391,840.04, 540,238.64 and 253,775.04 is: 349,885.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,840.04 : 540,238.64 = 253,775.04 : x
  2. Step 2: Convert to fraction form
    391,840.04/540,238.64 = 253,775.04/x
  3. Step 3: Cross multiply
    391,840.04x = 540,238.64 × 253,775.04
  4. Step 4: Simplify right side
    391,840.04x = 137,099,083,109.98
  5. Step 5: Solve for x
    x = 137,099,083,109.98/391,840.04
  6. Step 6: Final answer
    x = 349,885.34

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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.