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Finding the Fourth Proportional to 405,693.60, 608,540.40 and 403,360.80

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Solution

The fourth proportional to 405,693.60, 608,540.40 and 403,360.80 is: 605,041.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,693.60 : 608,540.40 = 403,360.80 : x
  2. Step 2: Convert to fraction form
    405,693.60/608,540.40 = 403,360.80/x
  3. Step 3: Cross multiply
    405,693.60x = 608,540.40 × 403,360.80
  4. Step 4: Simplify right side
    405,693.60x = 245,461,342,576.32
  5. Step 5: Solve for x
    x = 245,461,342,576.32/405,693.60
  6. Step 6: Final answer
    x = 605,041.20

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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.