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Finding the Fourth Proportional to 545,631.88, 753,009.82 and 330,781

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Solution

The fourth proportional to 545,631.88, 753,009.82 and 330,781 is: 456,500.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,631.88 : 753,009.82 = 330,781 : x
  2. Step 2: Convert to fraction form
    545,631.88/753,009.82 = 330,781/x
  3. Step 3: Cross multiply
    545,631.88x = 753,009.82 × 330,781
  4. Step 4: Simplify right side
    545,631.88x = 249,081,341,269.42
  5. Step 5: Solve for x
    x = 249,081,341,269.42/545,631.88
  6. Step 6: Final answer
    x = 456,500.71

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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.