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Finding the Fourth Proportional to 642,779.75, 886,980.38 and 367,136.25

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Solution

The fourth proportional to 642,779.75, 886,980.38 and 367,136.25 is: 506,616.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,779.75 : 886,980.38 = 367,136.25 : x
  2. Step 2: Convert to fraction form
    642,779.75/886,980.38 = 367,136.25/x
  3. Step 3: Cross multiply
    642,779.75x = 886,980.38 × 367,136.25
  4. Step 4: Simplify right side
    642,779.75x = 325,642,645,374.92
  5. Step 5: Solve for x
    x = 325,642,645,374.92/642,779.75
  6. Step 6: Final answer
    x = 506,616.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.