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Finding the Fourth Proportional to 539,890.30, 745,054.53 and 310,561.48

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Solution

The fourth proportional to 539,890.30, 745,054.53 and 310,561.48 is: 428,578.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,890.30 : 745,054.53 = 310,561.48 : x
  2. Step 2: Convert to fraction form
    539,890.30/745,054.53 = 310,561.48/x
  3. Step 3: Cross multiply
    539,890.30x = 745,054.53 × 310,561.48
  4. Step 4: Simplify right side
    539,890.30x = 231,385,237,517.50
  5. Step 5: Solve for x
    x = 231,385,237,517.50/539,890.30
  6. Step 6: Final answer
    x = 428,578.25

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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.