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Finding the Fourth Proportional to 651,928.80, 978,184.80 and 314,839.20

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Solution

The fourth proportional to 651,928.80, 978,184.80 and 314,839.20 is: 472,399.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,928.80 : 978,184.80 = 314,839.20 : x
  2. Step 2: Convert to fraction form
    651,928.80/978,184.80 = 314,839.20/x
  3. Step 3: Cross multiply
    651,928.80x = 978,184.80 × 314,839.20
  4. Step 4: Simplify right side
    651,928.80x = 307,970,919,884.16
  5. Step 5: Solve for x
    x = 307,970,919,884.16/651,928.80
  6. Step 6: Final answer
    x = 472,399.62

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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.