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Finding the Fourth Proportional to 345,090.40, 517,424.40 and 134,485.60

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Solution

The fourth proportional to 345,090.40, 517,424.40 and 134,485.60 is: 201,646.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,090.40 : 517,424.40 = 134,485.60 : x
  2. Step 2: Convert to fraction form
    345,090.40/517,424.40 = 134,485.60/x
  3. Step 3: Cross multiply
    345,090.40x = 517,424.40 × 134,485.60
  4. Step 4: Simplify right side
    345,090.40x = 69,586,130,888.64
  5. Step 5: Solve for x
    x = 69,586,130,888.64/345,090.40
  6. Step 6: Final answer
    x = 201,646.09

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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.