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Finding the Fourth Proportional to 545,630.88, 753,008.44 and 330,780

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Solution

The fourth proportional to 545,630.88, 753,008.44 and 330,780 is: 456,499.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,630.88 : 753,008.44 = 330,780 : x
  2. Step 2: Convert to fraction form
    545,630.88/753,008.44 = 330,780/x
  3. Step 3: Cross multiply
    545,630.88x = 753,008.44 × 330,780
  4. Step 4: Simplify right side
    545,630.88x = 249,080,131,783.20
  5. Step 5: Solve for x
    x = 249,080,131,783.20/545,630.88
  6. Step 6: Final answer
    x = 456,499.33

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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.