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Finding the Fourth Proportional to 391,775.12, 540,450.68 and 255,888.60

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Solution

The fourth proportional to 391,775.12, 540,450.68 and 255,888.60 is: 352,996.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,775.12 : 540,450.68 = 255,888.60 : x
  2. Step 2: Convert to fraction form
    391,775.12/540,450.68 = 255,888.60/x
  3. Step 3: Cross multiply
    391,775.12x = 540,450.68 × 255,888.60
  4. Step 4: Simplify right side
    391,775.12x = 138,295,166,594.81
  5. Step 5: Solve for x
    x = 138,295,166,594.81/391,775.12
  6. Step 6: Final answer
    x = 352,996.30

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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.