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Finding the Fourth Proportional to 717,071.13, 989,539.02 and 394,783.65

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Solution

The fourth proportional to 717,071.13, 989,539.02 and 394,783.65 is: 544,790.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,071.13 : 989,539.02 = 394,783.65 : x
  2. Step 2: Convert to fraction form
    717,071.13/989,539.02 = 394,783.65/x
  3. Step 3: Cross multiply
    717,071.13x = 989,539.02 × 394,783.65
  4. Step 4: Simplify right side
    717,071.13x = 390,653,826,133.02
  5. Step 5: Solve for x
    x = 390,653,826,133.02/717,071.13
  6. Step 6: Final answer
    x = 544,790.90

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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.