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Finding the Fourth Proportional to 613,281.60, 918,172.80 and 543,297.60

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Solution

The fourth proportional to 613,281.60, 918,172.80 and 543,297.60 is: 813,396.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,281.60 : 918,172.80 = 543,297.60 : x
  2. Step 2: Convert to fraction form
    613,281.60/918,172.80 = 543,297.60/x
  3. Step 3: Cross multiply
    613,281.60x = 918,172.80 × 543,297.60
  4. Step 4: Simplify right side
    613,281.60x = 498,841,078,625.28
  5. Step 5: Solve for x
    x = 498,841,078,625.28/613,281.60
  6. Step 6: Final answer
    x = 813,396.45

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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.