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Finding the Fourth Proportional to 403,542.96, 605,312.80 and 123,059.40

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Solution

The fourth proportional to 403,542.96, 605,312.80 and 123,059.40 is: 184,588.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,542.96 : 605,312.80 = 123,059.40 : x
  2. Step 2: Convert to fraction form
    403,542.96/605,312.80 = 123,059.40/x
  3. Step 3: Cross multiply
    403,542.96x = 605,312.80 × 123,059.40
  4. Step 4: Simplify right side
    403,542.96x = 74,489,429,980.32
  5. Step 5: Solve for x
    x = 74,489,429,980.32/403,542.96
  6. Step 6: Final answer
    x = 184,588.60

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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.