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Finding the Fourth Proportional to 717,487.36, 990,132.45 and 395,197.45

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Solution

The fourth proportional to 717,487.36, 990,132.45 and 395,197.45 is: 545,372.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,487.36 : 990,132.45 = 395,197.45 : x
  2. Step 2: Convert to fraction form
    717,487.36/990,132.45 = 395,197.45/x
  3. Step 3: Cross multiply
    717,487.36x = 990,132.45 × 395,197.45
  4. Step 4: Simplify right side
    717,487.36x = 391,297,812,475.60
  5. Step 5: Solve for x
    x = 391,297,812,475.60/717,487.36
  6. Step 6: Final answer
    x = 545,372.42

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Double scale
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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.