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Finding the Fourth Proportional to 539,930.04, 745,247.57 and 310,512.39

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Solution

The fourth proportional to 539,930.04, 745,247.57 and 310,512.39 is: 428,589.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,930.04 : 745,247.57 = 310,512.39 : x
  2. Step 2: Convert to fraction form
    539,930.04/745,247.57 = 310,512.39/x
  3. Step 3: Cross multiply
    539,930.04x = 745,247.57 × 310,512.39
  4. Step 4: Simplify right side
    539,930.04x = 231,408,602,549.83
  5. Step 5: Solve for x
    x = 231,408,602,549.83/539,930.04
  6. Step 6: Final answer
    x = 428,589.98

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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.