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Finding the Fourth Proportional to 717,457.97, 990,136.86 and 395,167.97

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Solution

The fourth proportional to 717,457.97, 990,136.86 and 395,167.97 is: 545,356.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,457.97 : 990,136.86 = 395,167.97 : x
  2. Step 2: Convert to fraction form
    717,457.97/990,136.86 = 395,167.97/x
  3. Step 3: Cross multiply
    717,457.97x = 990,136.86 × 395,167.97
  4. Step 4: Simplify right side
    717,457.97x = 391,270,372,988.37
  5. Step 5: Solve for x
    x = 391,270,372,988.37/717,457.97
  6. Step 6: Final answer
    x = 545,356.51

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1.5x scale

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.