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Finding the Fourth Proportional to 669,978, 924,569.64 and 368,172

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Solution

The fourth proportional to 669,978, 924,569.64 and 368,172 is: 508,077.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,978 : 924,569.64 = 368,172 : x
  2. Step 2: Convert to fraction form
    669,978/924,569.64 = 368,172/x
  3. Step 3: Cross multiply
    669,978x = 924,569.64 × 368,172
  4. Step 4: Simplify right side
    669,978x = 340,400,653,498.08
  5. Step 5: Solve for x
    x = 340,400,653,498.08/669,978
  6. Step 6: Final answer
    x = 508,077.36

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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.