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Finding the Fourth Proportional to 391,483.82, 540,238.76 and 228,130.11

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Solution

The fourth proportional to 391,483.82, 540,238.76 and 228,130.11 is: 314,814.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,483.82 : 540,238.76 = 228,130.11 : x
  2. Step 2: Convert to fraction form
    391,483.82/540,238.76 = 228,130.11/x
  3. Step 3: Cross multiply
    391,483.82x = 540,238.76 × 228,130.11
  4. Step 4: Simplify right side
    391,483.82x = 123,244,727,459.90
  5. Step 5: Solve for x
    x = 123,244,727,459.90/391,483.82
  6. Step 6: Final answer
    x = 314,814.36

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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.