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Finding the Fourth Proportional to 515,779.80, 773,779.05 and 155,921.10

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Solution

The fourth proportional to 515,779.80, 773,779.05 and 155,921.10 is: 233,914.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,779.80 : 773,779.05 = 155,921.10 : x
  2. Step 2: Convert to fraction form
    515,779.80/773,779.05 = 155,921.10/x
  3. Step 3: Cross multiply
    515,779.80x = 773,779.05 × 155,921.10
  4. Step 4: Simplify right side
    515,779.80x = 120,648,480,632.96
  5. Step 5: Solve for x
    x = 120,648,480,632.96/515,779.80
  6. Step 6: Final answer
    x = 233,914.71

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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.