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Finding the Fourth Proportional to 643,460.58, 888,017.65 and 371,539.94

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Solution

The fourth proportional to 643,460.58, 888,017.65 and 371,539.94 is: 512,749.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,460.58 : 888,017.65 = 371,539.94 : x
  2. Step 2: Convert to fraction form
    643,460.58/888,017.65 = 371,539.94/x
  3. Step 3: Cross multiply
    643,460.58x = 888,017.65 × 371,539.94
  4. Step 4: Simplify right side
    643,460.58x = 329,934,019,031.00
  5. Step 5: Solve for x
    x = 329,934,019,031.00/643,460.58
  6. Step 6: Final answer
    x = 512,749.39

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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.