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Finding the Fourth Proportional to 519,266.80, 779,118.90 and 282,779.20

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Solution

The fourth proportional to 519,266.80, 779,118.90 and 282,779.20 is: 424,287.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,266.80 : 779,118.90 = 282,779.20 : x
  2. Step 2: Convert to fraction form
    519,266.80/779,118.90 = 282,779.20/x
  3. Step 3: Cross multiply
    519,266.80x = 779,118.90 × 282,779.20
  4. Step 4: Simplify right side
    519,266.80x = 220,318,619,246.88
  5. Step 5: Solve for x
    x = 220,318,619,246.88/519,266.80
  6. Step 6: Final answer
    x = 424,287.90

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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.