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Finding the Fourth Proportional to 643,356.90, 965,043.45 and 170,038.08

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Solution

The fourth proportional to 643,356.90, 965,043.45 and 170,038.08 is: 255,059.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,356.90 : 965,043.45 = 170,038.08 : x
  2. Step 2: Convert to fraction form
    643,356.90/965,043.45 = 170,038.08/x
  3. Step 3: Cross multiply
    643,356.90x = 965,043.45 × 170,038.08
  4. Step 4: Simplify right side
    643,356.90x = 164,094,135,354.58
  5. Step 5: Solve for x
    x = 164,094,135,354.58/643,356.90
  6. Step 6: Final answer
    x = 255,059.26

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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.