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Finding the Fourth Proportional to 695,143.55, 959,271.53 and 389,191.31

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Solution

The fourth proportional to 695,143.55, 959,271.53 and 389,191.31 is: 537,069.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,143.55 : 959,271.53 = 389,191.31 : x
  2. Step 2: Convert to fraction form
    695,143.55/959,271.53 = 389,191.31/x
  3. Step 3: Cross multiply
    695,143.55x = 959,271.53 × 389,191.31
  4. Step 4: Simplify right side
    695,143.55x = 373,340,136,664.09
  5. Step 5: Solve for x
    x = 373,340,136,664.09/695,143.55
  6. Step 6: Final answer
    x = 537,069.13

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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.