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Finding the Fourth Proportional to 403,187.68, 604,606.76 and 122,640.16

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Solution

The fourth proportional to 403,187.68, 604,606.76 and 122,640.16 is: 183,907.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,187.68 : 604,606.76 = 122,640.16 : x
  2. Step 2: Convert to fraction form
    403,187.68/604,606.76 = 122,640.16/x
  3. Step 3: Cross multiply
    403,187.68x = 604,606.76 × 122,640.16
  4. Step 4: Simplify right side
    403,187.68x = 74,149,069,783.48
  5. Step 5: Solve for x
    x = 74,149,069,783.48/403,187.68
  6. Step 6: Final answer
    x = 183,907.08

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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.