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Finding the Fourth Proportional to 445,473.60, 666,266.40 and 398,428.80

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Solution

The fourth proportional to 445,473.60, 666,266.40 and 398,428.80 is: 595,904.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,473.60 : 666,266.40 = 398,428.80 : x
  2. Step 2: Convert to fraction form
    445,473.60/666,266.40 = 398,428.80/x
  3. Step 3: Cross multiply
    445,473.60x = 666,266.40 × 398,428.80
  4. Step 4: Simplify right side
    445,473.60x = 265,459,722,232.32
  5. Step 5: Solve for x
    x = 265,459,722,232.32/445,473.60
  6. Step 6: Final answer
    x = 595,904.50

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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.