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Finding the Fourth Proportional to 717,460.05, 990,101.58 and 395,171.31

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Solution

The fourth proportional to 717,460.05, 990,101.58 and 395,171.31 is: 545,340.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,460.05 : 990,101.58 = 395,171.31 : x
  2. Step 2: Convert to fraction form
    717,460.05/990,101.58 = 395,171.31/x
  3. Step 3: Cross multiply
    717,460.05x = 990,101.58 × 395,171.31
  4. Step 4: Simplify right side
    717,460.05x = 391,259,738,401.67
  5. Step 5: Solve for x
    x = 391,259,738,401.67/717,460.05
  6. Step 6: Final answer
    x = 545,340.10

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Half scale
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Double scale
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Similar ratio
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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.