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Finding the Fourth Proportional to 647,555.10, 971,332.65 and 544,911.90

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Solution

The fourth proportional to 647,555.10, 971,332.65 and 544,911.90 is: 817,367.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,555.10 : 971,332.65 = 544,911.90 : x
  2. Step 2: Convert to fraction form
    647,555.10/971,332.65 = 544,911.90/x
  3. Step 3: Cross multiply
    647,555.10x = 971,332.65 × 544,911.90
  4. Step 4: Simplify right side
    647,555.10x = 529,290,719,843.54
  5. Step 5: Solve for x
    x = 529,290,719,843.54/647,555.10
  6. Step 6: Final answer
    x = 817,367.85

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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.