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Finding the Fourth Proportional to 391,483.97, 540,238.88 and 228,130.07

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Solution

The fourth proportional to 391,483.97, 540,238.88 and 228,130.07 is: 314,814.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,483.97 : 540,238.88 = 228,130.07 : x
  2. Step 2: Convert to fraction form
    391,483.97/540,238.88 = 228,130.07/x
  3. Step 3: Cross multiply
    391,483.97x = 540,238.88 × 228,130.07
  4. Step 4: Simplify right side
    391,483.97x = 123,244,729,669.28
  5. Step 5: Solve for x
    x = 123,244,729,669.28/391,483.97
  6. Step 6: Final answer
    x = 314,814.25

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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.