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Finding the Fourth Proportional to 401,390.88, 554,294.52 and 258,399.60

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Solution

The fourth proportional to 401,390.88, 554,294.52 and 258,399.60 is: 356,832.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,390.88 : 554,294.52 = 258,399.60 : x
  2. Step 2: Convert to fraction form
    401,390.88/554,294.52 = 258,399.60/x
  3. Step 3: Cross multiply
    401,390.88x = 554,294.52 × 258,399.60
  4. Step 4: Simplify right side
    401,390.88x = 143,229,482,250.19
  5. Step 5: Solve for x
    x = 143,229,482,250.19/401,390.88
  6. Step 6: Final answer
    x = 356,832.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.