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Finding the Fourth Proportional to 405,770.40, 608,655.60 and 279,799.20

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Solution

The fourth proportional to 405,770.40, 608,655.60 and 279,799.20 is: 419,698.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,770.40 : 608,655.60 = 279,799.20 : x
  2. Step 2: Convert to fraction form
    405,770.40/608,655.60 = 279,799.20/x
  3. Step 3: Cross multiply
    405,770.40x = 608,655.60 × 279,799.20
  4. Step 4: Simplify right side
    405,770.40x = 170,301,349,955.52
  5. Step 5: Solve for x
    x = 170,301,349,955.52/405,770.40
  6. Step 6: Final answer
    x = 419,698.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.