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Finding the Fourth Proportional to 391,495.54, 540,238.27 and 230,319.45

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Solution

The fourth proportional to 391,495.54, 540,238.27 and 230,319.45 is: 317,825.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,495.54 : 540,238.27 = 230,319.45 : x
  2. Step 2: Convert to fraction form
    391,495.54/540,238.27 = 230,319.45/x
  3. Step 3: Cross multiply
    391,495.54x = 540,238.27 × 230,319.45
  4. Step 4: Simplify right side
    391,495.54x = 124,427,381,215.35
  5. Step 5: Solve for x
    x = 124,427,381,215.35/391,495.54
  6. Step 6: Final answer
    x = 317,825.79

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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.