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Finding the Fourth Proportional to 546,937.20, 820,405.80 and 191,987.10

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Solution

The fourth proportional to 546,937.20, 820,405.80 and 191,987.10 is: 287,980.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    546,937.20 : 820,405.80 = 191,987.10 : x
  2. Step 2: Convert to fraction form
    546,937.20/820,405.80 = 191,987.10/x
  3. Step 3: Cross multiply
    546,937.20x = 820,405.80 × 191,987.10
  4. Step 4: Simplify right side
    546,937.20x = 157,507,330,365.18
  5. Step 5: Solve for x
    x = 157,507,330,365.18/546,937.20
  6. Step 6: Final answer
    x = 287,980.65

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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.