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Finding the Fourth Proportional to 703,693.98, 971,187.63 and 393,613.80

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Solution

The fourth proportional to 703,693.98, 971,187.63 and 393,613.80 is: 543,237.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,693.98 : 971,187.63 = 393,613.80 : x
  2. Step 2: Convert to fraction form
    703,693.98/971,187.63 = 393,613.80/x
  3. Step 3: Cross multiply
    703,693.98x = 971,187.63 × 393,613.80
  4. Step 4: Simplify right side
    703,693.98x = 382,272,853,557.29
  5. Step 5: Solve for x
    x = 382,272,853,557.29/703,693.98
  6. Step 6: Final answer
    x = 543,237.35

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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.