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Finding the Fourth Proportional to 661,994.10, 991,970.55 and 492,720.30

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Solution

The fourth proportional to 661,994.10, 991,970.55 and 492,720.30 is: 738,320.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,994.10 : 991,970.55 = 492,720.30 : x
  2. Step 2: Convert to fraction form
    661,994.10/991,970.55 = 492,720.30/x
  3. Step 3: Cross multiply
    661,994.10x = 991,970.55 × 492,720.30
  4. Step 4: Simplify right side
    661,994.10x = 488,764,026,987.17
  5. Step 5: Solve for x
    x = 488,764,026,987.17/661,994.10
  6. Step 6: Final answer
    x = 738,320.82

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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.