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Finding the Fourth Proportional to 717,908.98, 990,667.53 and 395,619.01

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Solution

The fourth proportional to 717,908.98, 990,667.53 and 395,619.01 is: 545,928.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,908.98 : 990,667.53 = 395,619.01 : x
  2. Step 2: Convert to fraction form
    717,908.98/990,667.53 = 395,619.01/x
  3. Step 3: Cross multiply
    717,908.98x = 990,667.53 × 395,619.01
  4. Step 4: Simplify right side
    717,908.98x = 391,926,907,457.75
  5. Step 5: Solve for x
    x = 391,926,907,457.75/717,908.98
  6. Step 6: Final answer
    x = 545,928.41

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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.