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Finding the Fourth Proportional to 717,457.05, 990,097.43 and 395,168.31

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Solution

The fourth proportional to 717,457.05, 990,097.43 and 395,168.31 is: 545,335.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,457.05 : 990,097.43 = 395,168.31 : x
  2. Step 2: Convert to fraction form
    717,457.05/990,097.43 = 395,168.31/x
  3. Step 3: Cross multiply
    717,457.05x = 990,097.43 × 395,168.31
  4. Step 4: Simplify right side
    717,457.05x = 391,255,126,172.60
  5. Step 5: Solve for x
    x = 391,255,126,172.60/717,457.05
  6. Step 6: Final answer
    x = 545,335.96

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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.