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Finding the Fourth Proportional to 692,406, 955,553.29 and 390,600

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Solution

The fourth proportional to 692,406, 955,553.29 and 390,600 is: 539,046.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,406 : 955,553.29 = 390,600 : x
  2. Step 2: Convert to fraction form
    692,406/955,553.29 = 390,600/x
  3. Step 3: Cross multiply
    692,406x = 955,553.29 × 390,600
  4. Step 4: Simplify right side
    692,406x = 373,239,114,097.50
  5. Step 5: Solve for x
    x = 373,239,114,097.50/692,406
  6. Step 6: Final answer
    x = 539,046.62

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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.