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Finding the Fourth Proportional to 717,203.82, 989,741.25 and 394,913.13

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Solution

The fourth proportional to 717,203.82, 989,741.25 and 394,913.13 is: 544,980.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,203.82 : 989,741.25 = 394,913.13 : x
  2. Step 2: Convert to fraction form
    717,203.82/989,741.25 = 394,913.13/x
  3. Step 3: Cross multiply
    717,203.82x = 989,741.25 × 394,913.13
  4. Step 4: Simplify right side
    717,203.82x = 390,861,814,927.61
  5. Step 5: Solve for x
    x = 390,861,814,927.61/717,203.82
  6. Step 6: Final answer
    x = 544,980.11

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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.