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Finding the Fourth Proportional to 717,254.40, 989,817.93 and 394,975.92

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Solution

The fourth proportional to 717,254.40, 989,817.93 and 394,975.92 is: 545,070.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,254.40 : 989,817.93 = 394,975.92 : x
  2. Step 2: Convert to fraction form
    717,254.40/989,817.93 = 394,975.92/x
  3. Step 3: Cross multiply
    717,254.40x = 989,817.93 × 394,975.92
  4. Step 4: Simplify right side
    717,254.40x = 390,954,247,534.25
  5. Step 5: Solve for x
    x = 390,954,247,534.25/717,254.40
  6. Step 6: Final answer
    x = 545,070.55

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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.