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Finding the Fourth Proportional to 516,579.30, 774,978.30 and 156,720.60

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Solution

The fourth proportional to 516,579.30, 774,978.30 and 156,720.60 is: 235,114.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,579.30 : 774,978.30 = 156,720.60 : x
  2. Step 2: Convert to fraction form
    516,579.30/774,978.30 = 156,720.60/x
  3. Step 3: Cross multiply
    516,579.30x = 774,978.30 × 156,720.60
  4. Step 4: Simplify right side
    516,579.30x = 121,455,064,162.98
  5. Step 5: Solve for x
    x = 121,455,064,162.98/516,579.30
  6. Step 6: Final answer
    x = 235,114.07

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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.