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Finding the Fourth Proportional to 492,168.08, 679,175.88 and 310,978.64

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Solution

The fourth proportional to 492,168.08, 679,175.88 and 310,978.64 is: 429,140.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,168.08 : 679,175.88 = 310,978.64 : x
  2. Step 2: Convert to fraction form
    492,168.08/679,175.88 = 310,978.64/x
  3. Step 3: Cross multiply
    492,168.08x = 679,175.88 × 310,978.64
  4. Step 4: Simplify right side
    492,168.08x = 211,209,191,483.20
  5. Step 5: Solve for x
    x = 211,209,191,483.20/492,168.08
  6. Step 6: Final answer
    x = 429,140.37

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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.