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Finding the Fourth Proportional to 545,713.14, 819,128.28 and 450,640.40

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Solution

The fourth proportional to 545,713.14, 819,128.28 and 450,640.40 is: 676,421.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,713.14 : 819,128.28 = 450,640.40 : x
  2. Step 2: Convert to fraction form
    545,713.14/819,128.28 = 450,640.40/x
  3. Step 3: Cross multiply
    545,713.14x = 819,128.28 × 450,640.40
  4. Step 4: Simplify right side
    545,713.14x = 369,132,295,750.51
  5. Step 5: Solve for x
    x = 369,132,295,750.51/545,713.14
  6. Step 6: Final answer
    x = 676,421.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.