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Finding the Fourth Proportional to 657,090.54, 985,643.64 and 257,919.30

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Solution

The fourth proportional to 657,090.54, 985,643.64 and 257,919.30 is: 386,882.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,090.54 : 985,643.64 = 257,919.30 : x
  2. Step 2: Convert to fraction form
    657,090.54/985,643.64 = 257,919.30/x
  3. Step 3: Cross multiply
    657,090.54x = 985,643.64 × 257,919.30
  4. Step 4: Simplify right side
    657,090.54x = 254,216,517,678.25
  5. Step 5: Solve for x
    x = 254,216,517,678.25/657,090.54
  6. Step 6: Final answer
    x = 386,882.02

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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.