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Finding the Fourth Proportional to 403,641.68, 552,991.86 and 388,507.76

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Solution

The fourth proportional to 403,641.68, 552,991.86 and 388,507.76 is: 532,258.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,641.68 : 552,991.86 = 388,507.76 : x
  2. Step 2: Convert to fraction form
    403,641.68/552,991.86 = 388,507.76/x
  3. Step 3: Cross multiply
    403,641.68x = 552,991.86 × 388,507.76
  4. Step 4: Simplify right side
    403,641.68x = 214,841,628,826.83
  5. Step 5: Solve for x
    x = 214,841,628,826.83/403,641.68
  6. Step 6: Final answer
    x = 532,258.29

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.